Have you ever received a message with ctfu and had no idea what it meant? You are not alone. Many people search for what does ctfu mean in text, ctfu slang meaning, and what is ctfu because this slang appears everywhere on social media and in chats. If you are wondering about ctfu meaning in text, this guide will help you understand it in a simple way.

In this article, you will learn the real ctfu meaning in text, where this slang came from, and how people use it in everyday conversations. We will also cover examples, different situations, common mistakes, and similar slang words. By the end, you will feel confident using and understanding CTFU whenever you see it online.

Quick Facts 

Quick Fact	Details
Full Form	Cracking The F*** Up
Core Meaning	Intense, uncontrollable laughter
Tone	Informal, slightly crude
Intensity Level	High (similar to LMAO/ROFL, stronger than LOL)
Origin	African American Vernacular English (AAVE), early online/text culture
Common Platforms	TikTok, Instagram, Snapchat, WhatsApp, Discord, X (Twitter)
Best Used For	Reacting to genuinely funny or shocking moments
Avoid Using In	Emails, formal reports, academic writing, client communication
Secondary Meanings	Shock/surprise, sarcasm, social bonding
Common Mix-Up	Mistaken for anger due to profanity in full form
Closest Alternatives	LMAO, LMFAO, ROFL
Milder Alternatives	LOL, haha
Popular Among	Gen Z, younger millennials, internet-native users
Typical Format	Lowercase, no punctuation (e.g., “ctfu”)
Common Settings	Group chats, social media comments, gaming chat, dating apps

Meaning & Definition

CTFU is a texting abbreviation that has become a regular fixture in casual digital communication, especially among younger users. Understanding what CTFU means requires looking at both its literal expansion and the emotional weight it carries in everyday conversations. Unlike more generic laughter acronyms, it’s built to express a noticeably higher level of amusement.

The acronym stands for “Cracking The F*** Up,” a phrase that mirrors the physical sensation of laughing so hard it feels almost involuntary. This origin makes it intentionally informal and slightly crude, which is part of why it resonates so strongly in casual texting culture. It’s not meant for polished writing it’s built for fast, reactive, emotionally charged exchanges.

A few key points capture its core definition:

• Represents intense, often uncontrollable laughter rather than mild amusement
• Functions as a substitute for the tone and expression missing from text-based conversation
• Carries an informal, slightly crude tone due to its full-phrase expansion
• Works best in casual settings rather than formal or professional communication

Primary Meaning

The primary meaning of CTFU is simple: it signals that something is extremely funny, often to the point of losing composure. This is the most widely understood interpretation across nearly every messaging app and social platform.

It’s typically reserved for genuinely surprising or hilarious moments rather than everyday mild humor. Whether reacting to a funny story, an awkward mishap, or a viral clip, CTFU conveys a stronger emotional punch than more casual alternatives.

Example Usage:

To understand how this plays out in real conversations, consider these common scenarios:

• “Bro just tripped over his own shoelace in front of everyone, CTFU”
• “She sent the wrong text to the entire group chat by accident, CTFU”
• “This meme just took me out, CTFU 😂”

In each case, CTFU is used as a direct reaction to something unexpected and humorous. It’s rarely used to describe mild amusement instead, it’s reserved for moments that genuinely catch someone off guard with how funny they are.

Emotional Tone and Intensity:

The emotional tone behind CTFU is more intense than a simple laugh. While “haha” or “lol” might represent light amusement, CTFU carries a stronger emotional charge, similar to extreme laughter or uncontrollable laughter that physically affects the person typing it. This intensity level is part of why CTFU has remained relevant: it gives users a way to express degrees of humor rather than treating all funny moments the same way.

This layered approach to emotional expression is one of the defining features of modern texting slang. Instead of relying on a single laughter acronym for every reaction, users now have an entire vocabulary from a mild “haha” to a full-intensity CTFU that allows for more nuanced, accurate communication of emotional tone in casual conversations.

Secondary Meanings

While CTFU is primarily used to express intense laughter, online communities have stretched its meaning over time to fit other emotional reactions. It now sometimes conveys shock, sarcasm, or even a sense of social bonding between friends who share the same sense of humor.

These secondary uses show how flexible internet slang can become once it spreads across different communities. Depending on the context, CTFU might express disbelief, dry sarcasm, or simply reinforce an inside joke shared between people.

1. Expressing Shock or Surprise

In some cases, CTFU is used less for humor and more for shock. When something happens that’s so unexpected it borders on unbelievable, people sometimes type CTFU as a way of saying “I can’t believe that just happened,” blending surprise with disbelief-driven laughter.

2. Sarcastic Humor

CTFU also appears in sarcastic contexts, where the laughter being expressed isn’t genuine amusement but rather a mocking or ironic reaction. This usage is common in online forums and Reddit slang, where sarcasm is a dominant communication style and CTFU becomes a tool for dry, biting humor rather than wholesome amusement.

3. Social Bonding Expression

Beyond individual reactions, CTFU can function as a social bonding expression. When friends share inside jokes or relive funny memories together, using CTFU reinforces a shared emotional experience. It signals that both parties find the same thing funny, strengthening casual conversations and group dynamics, particularly in close-knit Discord chats or long-running group texts.

Background & Origin

The origin of CTFU traces back to African American Vernacular English (AAVE) and early online communication, particularly within hip-hop and urban youth culture where expressive, exaggerated language has long been a stylistic norm. Like many internet acronyms, CTFU gained traction through word-of-mouth digital spread rather than formal definition, moving from text messages into broader online communication as social media platforms expanded.

Its rise mirrors the broader pattern seen with other laughter acronyms. Just as LMAO and ROFL emerged to express escalating levels of amusement beyond simple “lol,” CTFU developed to fill a specific gap: conveying laughter so intense it feels almost involuntary. The phrase’s slightly profane expansion gave it an edgy, authentic feel that resonated particularly well with younger users seeking language that felt less sanitized than corporate-friendly alternatives.

Meme culture played a significant role in cementing CTFU’s place in modern slang. As funny videos, screenshots, and viral content spread across platforms, CTFU became a natural caption or comment, attached to content that provoked genuine, uncontrollable reactions. This pairing of acronym and viral content helped CTFU move beyond niche communities and into mainstream digital communication, particularly among Gen Z and younger millennial users.

Usage in Different Contexts

CTFU shows up most naturally in casual, low-stakes situations, like reacting to funny texts, commenting on viral content, or responding to embarrassing real-life stories. It also fits well within gaming chats and group threads where humor flows freely.

That said, it’s best avoided in formal settings like business emails, academic writing, or professional communication. Given its crude expansion, using CTFU in the wrong context can easily come across as inappropriate or unprofessional.

Common Situations Where CTFU Is Used:

CTFU tends to show up most naturally in the following situations:

1. Reacting to funny text messages from friends or family
2. Commenting on humorous social media posts or videos
3. Responding to embarrassing or unexpected real-life stories
4. Reacting within gaming chat during funny in-game moments
5. Adding commentary to memes or viral content shared in group chats

When to Avoid Using CTFU:

There are also clear situations where CTFU should be avoided entirely:

• Business emails or formal workplace communication
• Academic writing or professional reports
• Conversations with people you don’t know well, especially in professional settings
• Customer service interactions
• Any communication where crude language could be considered inappropriate

Recognizing this contrast between casual and formal settings is essential. While CTFU thrives in informal communication, it can come across as unprofessional or even disrespectful if used in the wrong setting, particularly because of its profanity-based expansion.

Chat & Messaging

CTFU feels most natural in messaging apps, where speed and informality already shape how people communicate. It functions almost like digital body language, replacing the laughter you’d express out loud during an in-person conversation.

Its popularity in chat comes down to practicality and emotional accuracy. It’s quick to type, carries more weight than generic alternatives, and fits naturally into the relaxed grammar already common across texting culture.

Real-World Chat Examples:

Typical chat exchanges featuring CTFU often look like this:

• “He really thought no one saw him fall asleep in class CTFU”
• “Wait you actually called your teacher mom?? CTFU”
• “This is the funniest thing I’ve seen all week CTFU”

These examples highlight how CTFU integrates naturally into ongoing text conversations, often appearing without capitalization or punctuation, consistent with the relaxed grammar typical of texting culture.

Why It’s Popular in Messaging:

CTFU remains popular in chat and messaging environments for several practical reasons. First, it’s quick to type, requiring far less effort than writing out a full sentence describing laughter. Second, it carries more emotional weight than generic alternatives, making reactions feel more genuine. Third, its slightly rebellious tone appeals to users who want their digital communication to feel personal rather than formulaic.

Messaging apps like WhatsApp, iMessage, and SMS have also normalized abbreviated language overall, creating an environment where chat abbreviations like CTFU fit naturally into the broader texting vocabulary already in use.

Social Media

Social media has significantly widened CTFU’s reach beyond private texting, turning it into a common comment, reply, and caption across public posts. Platforms like Instagram and X (Twitter) frequently see it used as a quick reaction to humorous content shared by others.

Captions also lean on CTFU often, especially on Instagram Reels and similar formats, pairing it with relatable, funny moments. This blend of humor and authenticity tends to boost engagement, encouraging more likes, shares, and comments.

Social Media Usage Examples:

On platforms like Instagram and X (Twitter), CTFU often appears as a direct comment on humorous posts: “CTFU this is too accurate” or “Not him doing this on camera CTFU.” These short, reactive comments mirror how users would respond verbally if watching the content with friends.

Example Caption:

Captions also frequently include CTFU, particularly on TikTok and Instagram Reels, such as: “POV: you forgot you were still recording CTFU 💀” This style of caption blends humor with relatability, a combination that performs particularly well in social media slang and tends to generate higher engagement through likes, shares, and comments.

Professional Fields

CTFU rarely belongs in professional communication due to its profanity-based expansion and overall casual tone. It might occasionally slip into informal internal chats among coworkers with an established rapport, but even then, it carries some risk in workplace settings.

For anything client-facing, formal, or potentially archived, safer alternatives like “that’s hilarious” or a simple “lol” work better. These options keep the warmth of the reaction intact without crossing into language that could come across as unprofessional.

Situations Where It May Appear Professionally:

In rare, highly informal workplace cultures such as internal team chats in creative agencies, gaming companies, or social media marketing teams CTFU might occasionally appear in casual internal messaging, particularly among colleagues who already have an established informal rapport.

Situations Where It Should Be Avoided:

However, CTFU should never appear in:

• Client-facing emails or proposals
• Internal reports or formal documentation
• LinkedIn posts or professional networking comments
• Any communication that could be archived, audited, or shared externally

Professional Alternatives:

For workplace settings, safer alternatives exist that convey similar enthusiasm without the crude undertone. Phrases like “that’s hilarious,” “I couldn’t stop laughing,” or even a simple “lol” tend to be far more appropriate substitutes that maintain professionalism while still acknowledging humor.

Meanings Across Platforms

CTFU doesn’t carry the exact same tone everywhere it’s used; its meaning shifts slightly depending on the platform. On personal messaging apps, it tends to function as a genuine, private reaction between people who already know each other well.

On public platforms like Instagram or X, CTFU often plays a more performative role, aimed at entertaining a wider audience. In forums and communities like Reddit, it sometimes leans more sarcastic, fitting the dry humor common in those spaces.

Messaging Platforms

On platforms like WhatsApp, iMessage, and standard SMS, CTFU functions almost purely as a personal reaction tool, exchanged between people who already know each other well and share an established communication style.

Social Media Platforms

On Instagram, X (Twitter), and Snapchat, CTFU often appears more publicly, used in comments and captions where the goal is partly to entertain a wider audience rather than just react privately.

Online Communities and Forums

Within Reddit slang and other forum-based communities, CTFU sometimes carries a slightly more sarcastic or dry-humor connotation, fitting the often ironic communication style that’s common in these spaces compared to more sincere usage on personal messaging apps.

Other Fields

CTFU has moved beyond personal texting into several specialized digital spaces. In digital marketing and content creation, brands targeting younger audiences sometimes use CTFU in captions or comments to feel more relatable and culturally current. This helps content blend naturally into casual online spaces instead of feeling overly polished or corporate.

Gaming and streaming communities have also adopted the term heavily. Within Discord chats or Twitch live chat, CTFU often appears during funny in-game moments or stream highlights, contributing to the shared, real-time reactions that define these communities. It works similarly during entertainment-focused live streams, where viewers type CTFU together as a collective response to something genuinely funny happening on screen.

Digital Marketing and Content Creation

In digital marketing and content creation, brands targeting younger audiences sometimes incorporate CTFU into captions or comments to appear more relatable and culturally current, helping content blend in naturally rather than feeling overly corporate or scripted.

Gaming Communities

Within gaming communities, CTFU frequently appears in live chat reactions during funny in-game moments, stream clips, or post-match banter, particularly on platforms like Discord and Twitch chat, where instant emotional reactions are part of the culture.

Entertainment and Streaming

In entertainment and live streaming contexts, viewers often type CTFU in real time during funny moments, contributing to the collective, shared reaction that defines live chat culture during streams and broadcasts.

Common Misconceptions & Mistakes

Despite how widely CTFU is used, it’s still frequently misunderstood, especially by people less familiar with internet slang. Because the acronym contains profanity, some assume it expresses anger or frustration rather than laughter. Others mistakenly use it in semi-professional settings, not realizing how informal and crude the underlying phrase actually is.

Overuse is another common pitfall that weakens the term’s impact over time. When CTFU gets applied to every mildly funny moment, it loses the high-intensity meaning that makes it stand out from gentler alternatives like “lol.” Confusing it with similarly styled acronyms can also lead to mixed signals, so understanding its specific tone matters for clear communication.

Mistake 1: Assuming It Means Anger or Frustration

Because the acronym contains profanity, some people mistakenly assume CTFU expresses anger or frustration. In reality, it almost always conveys laughter and amusement, not negative emotion.

Mistake 2: Using It in Formal Communication

Some newer users, unaware of its informal nature, accidentally use CTFU in semi-professional settings, not realizing how casual and crude the underlying phrase actually is.

Mistake 3: Confusing It With Similar Acronyms

CTFU is sometimes confused with other acronyms that look or sound similar, leading to miscommunication about the intended emotional tone of a message.

Mistake 4: Overusing the Term

Using CTFU for every minor amusing moment can dilute its impact, since its strength lies in signaling genuinely intense laughter rather than everyday mild humor.

Similar Terms & Alternatives

CTFU belongs to a broader family of laughter acronyms, each carrying a slightly different intensity and tone. Terms like LOL and “haha” sit on the milder end, used for everyday, light amusement in casual conversations. Stronger alternatives like LMAO, LMFAO, and ROFL signal more exaggerated reactions, closer to where CTFU itself falls on the scale.

Choosing the right term often comes down to matching the actual emotional reaction rather than defaulting to one phrase for everything. A mild chuckle might call for a simple “haha,” while something genuinely shocking or hilarious fits better with CTFU or ROFL. Using the right intensity level helps keep digital conversations feeling authentic rather than exaggerated for no reason.

Popular Alternatives

Common alternatives include:

• LOL (Laughing Out Loud) – general, mild amusement
• LMAO (Laughing My A** Off) – stronger amusement
• ROFL (Rolling On the Floor Laughing) – physically exaggerated reaction
• LMFAO – an intensified version of LMAO
• Haha / Hahaha – simple, tone-flexible laughter

When to Use Each Alternative

Term	Intensity Level	Best Used For
Haha	Low	Light, polite amusement
LOL	Low-Medium	Everyday casual reactions
LMAO	Medium-High	Genuinely funny moments
CTFU	High	Intense, uncontrollable laughter
ROFL/LMFAO	Very High	Extreme, exaggerated humor

This table illustrates how laughter acronyms exist on a sliding scale, allowing users to choose the term that best matches their actual emotional reaction rather than defaulting to one generic option for every situation.

How to Respond to It

Responding to CTFU well depends largely on the relationship and setting. Among friends, the easiest approach is often to match the energy with something equally casual, like “I know right” or another CTFU in return. This keeps the conversational rhythm natural and shows you’re genuinely engaged with the humor.

In more neutral or unfamiliar settings, it’s worth dialing back the intensity slightly while still acknowledging the laughter. A reply like “Haha that’s too funny” or “That’s hilarious” keeps things warm without mirroring the crude undertone of CTFU itself. This balance helps the conversation stay friendly across different levels of familiarity.

Casual Response Options

Casual replies to CTFU usually stay short and match the same relaxed energy, things like “I know right,” “literally,” or “stop 😂.” Mirroring the reaction with another CTFU also works well, especially among friends who already share an established texting style.

Friendly or Social Responses

Friendly or social replies to CTFU often build on the humor rather than just acknowledging it, like “Stop CTFU 😂” or “Why is this so accurate CTFU.” This keeps the back-and-forth playful and shows genuine engagement with the joke rather than a flat, one-word reply.

Professional or Semi-Formal Responses

In more neutral settings, a safer reply might be “That’s hilarious” or “Haha that’s too funny,” preserving warmth without matching the crude undertone of CTFU itself.

Differences From Similar Words

CTFU stands apart from other laughter acronyms mainly through its intensity. While “haha” or “lol” suggest mild, everyday amusement, CTFU signals something closer to uncontrollable laughter, putting it in the same intensity range as LMAO or ROFL. Its tone is also more informal and edgier, largely due to its profanity-based expansion, which makes it less universally appropriate than gentler alternatives.

Context matters just as much as intensity when comparing these terms. LOL works almost anywhere in casual conversation, but CTFU is more situational, best saved for moments of genuine, strong humor rather than routine chatter. It’s also more closely tied to younger, internet-native users, whereas terms like LOL span a wider generational range across digital communication.

Emotional Intensity Difference

CTFU represents a higher emotional intensity than everyday laughter acronyms like LOL, signaling reactions closer to uncontrollable or extreme laughter. This places it in similar territory to LMAO or ROFL, rather than the milder amusement typically conveyed by simpler expressions.

Tone and Informality

CTFU carries a noticeably more informal and edgy tone than gentler alternatives like “haha,” largely due to its profanity-based expansion. This makes it well-suited for close, casual conversations but less appropriate in settings where a more neutral tone is expected.

Contextual Usage

CTFU is best reserved for moments of genuine, strong amusement rather than everyday conversational filler. Unlike LOL, which fits almost any casual context, CTFU works best when the situation truly calls for an intense reaction.

Cultural and Generational Trends

CTFU is more strongly associated with younger, internet-native users, while older alternatives like LOL span a broader generational range, having existed in digital communication for a longer period.

Relevance in Online Conversations & Dating Apps

CTFU has carved out a notable role within dating apps, where humor often does the heavy lifting in building early connection. On platforms like Tinder and Bumble, a well-placed CTFU signals genuine amusement rather than a generic, low-effort reply. It helps keep first conversations feeling natural instead of scripted or overly formal.

Because early dating conversations rely so heavily on chemistry and timing, a high-intensity reaction like CTFU can stand out more than a flat “lol” or “haha.” It shows authentic engagement with what the other person said, which matters when first impressions are largely built through text. Used naturally, it can make casual digital conversations feel more genuine and engaging.

Example in Dating Conversations:

On platforms like Tinder and Bumble, a typical exchange might look like: “Wait you actually said that on the first date?? CTFU” This kind of reaction helps keep early conversations light and engaging, signaling genuine interest and amusement rather than forced or scripted responses.

Because dating app conversations often rely heavily on humor to build initial chemistry, CTFU’s high-intensity laughter signal makes it a useful tool for showing authentic engagement rather than generic, low-effort replies.

Popularity & Trends Over Time

CTFU’s rise has closely tracked the broader growth of meme culture and short-form video content over the past several years. What started as a niche term within AAVE-influenced online spaces gradually spread through text messaging among younger users. From there, it expanded further as social media comment sections became a major hub for casual, reactive language.

The term has stayed popular because it fills a specific gap that softer alternatives like “lol” can’t quite cover: real, high-intensity laughter. As platforms like TikTok continue prioritizing fast, emotionally charged reactions, terms like CTFU that convey genuine amusement are likely to remain relevant. Its staying power reflects a larger shift toward more nuanced, authentic digital communication.

Growth Timeline:

Its growth can be roughly traced through these phases:

1. Early adoption within AAVE-influenced online communities
2. Expansion through text messaging among younger users
3. Mainstream spread via social media comment sections
4. Acceleration through meme culture and viral content sharing
5. Continued relevance through short-form video platforms like TikTok

Why It Remains Popular:

CTFU remains popular because it fills a specific emotional niche that gentler alternatives can’t fully capture. As digital communication continues to prioritize authenticity and emotional expression, terms like CTFU that convey genuine, high-intensity reactions are likely to remain relevant well into the future.

Ctfu Meaning from a Girl

When a girl uses CTFU in a text, the core meaning stays consistent with its standard definition: real, high-intensity laughter at something funny. That said, the surrounding context often shapes how it reads a reaction in a group chat feels different from one sent during a flirty back-and-forth. Most of the time, it’s simply an honest response to something genuinely amusing.

In closer relationships, CTFU can reinforce a shared joke or strengthen the easy rapport already built between friends. In dating or early conversations, it sometimes carries a lighter, more playful undertone, signaling enjoyment of the exchange rather than just acknowledging a joke. Either way, it rarely implies anything negative or sarcastic.

Possible Interpretations:

Depending on the conversation, it could mean:

• Genuine amusement at something funny that was shared
• A flirtatious, playful reaction during a budding conversation
• A bonding moment over a shared joke or inside reference
• Light-hearted deflection during an awkward or surprising moment

Ctfu Meaning in Text from a Guy

When a guy sends CTFU in a text, it usually carries the same core meaning as the standard definition: genuine, strong laughter at something funny. The tone, though, often depends on context whether it’s a casual group chat, a one-on-one conversation with a friend, or an early-stage dating app exchange. In most cases, it’s a straightforward reaction rather than something loaded with deeper meaning.

In friendships, CTFU often reinforces shared humor or inside jokes built up over time. In dating conversations, it can serve a slightly different purpose, helping keep the energy light and signaling genuine interest rather than a forced or generic reply. Either way, it generally reflects authentic amusement, not sarcasm or hidden frustration.

Common Interpretations:

Typical interpretations include:

• A straightforward reaction to something genuinely funny
• Casual banter between friends during group conversations
• A way of keeping conversation energy high during early dating app exchanges
• Reinforcing shared humor within an established friendship

Ctfu Meaning TikTok

On TikTok, CTFU shows up constantly in comments under funny clips, in captions describing embarrassing moments, and in duets reacting to original videos. It’s become a quick way for users to signal genuine, high-intensity laughter without writing out a full reaction.

The platform’s fast, visual style of humor makes CTFU a natural fit compared to milder alternatives like “lol.” Since TikTok thrives on exaggerated, in-the-moment comedy, CTFU’s intensity matches the energy viewers expect from the comment section.

How It Is Used on TikTok:

On TikTok, CTFU frequently appears in comments reacting to funny clips, in captions describing embarrassing or hilarious situations, and within duets or stitched videos responding to original content with added commentary.

Why CTFU Is Popular on TikTok:

CTFU thrives on TikTok because the platform itself is built around quick, emotionally charged reactions to short-form content. Its high-intensity laughter signal matches the platform’s fast-paced, highly visual humor style, making it a natural fit compared to milder alternatives that might feel underwhelming against TikTok’s exaggerated comedic tone.

Frequently Asked Questions

What does CTFU mean in text?

CTFU stands for “Cracking The F*** Up,” used to express intense, uncontrollable laughter in response to something extremely funny or unexpected during casual conversations.

Is CTFU appropriate for professional communication?

No, CTFU is too informal and crude for workplace emails, reports, or client messages. Use alternatives like “that’s hilarious” in professional settings instead.

What’s the difference between CTFU and LOL?

CTFU signals stronger, more intense laughter than LOL, similar to LMAO or ROFL. LOL represents milder, everyday amusement in casual conversations.

Where is CTFU most commonly used?

CTFU appears frequently on TikTok, Instagram, Snapchat, WhatsApp, and Discord, typically in comments, captions, and chats reacting to genuinely funny content.

Can CTFU mean something other than laughter?

Yes, CTFU sometimes expresses shock, sarcasm, or social bonding, though its primary meaning across most platforms remains intense, genuine laughter.

Who typically uses CTFU in conversations?

CTFU is most popular among Gen Z and younger millennials, especially in messaging apps, social media comments, and dating app conversations.

Conclusion

Understanding ctfu meaning in text is helpful if you want to keep up with modern online conversations. Now you know what ctfu means, what does ctfu mean in text, and ctfu slang meaning in simple words. If someone asks what is ctfu, you can easily explain it. Knowing ctfu meaning in text helps you avoid confusion and enjoy chats, memes, and social media posts with confidence.

As internet slang keeps changing, learning terms like ctfu meaning in text makes texting easier and more fun. Always pay attention to the conversation before using ctfu because it fits casual chats, not formal messages. We hope this guide answered what does ctfu mean in text and cleared up any confusion. Keep exploring new slang, and you will feel more confident every time you see ctfu meaning in text online.