Texting Abbreviations and Internet Slang: LMAO, IKR, LMK, IRL, AFK, TL;DR and More (Meanings)

Texting abbreviations are shortened phrases used in chats and social media: LMAO means "laughing my a-- off", IKR "I know, right?", LMK "let me know", IRL "in real life", AFK "away from keyboard" and TL;DR "too long; didn't read". They suit friends and casual chat. In emails, reports and most workplace messages, write the full phrase instead.

What do texting abbreviations mean?

Texting abbreviations (also called chat acronyms or internet slang) are short forms that people use to type faster and sound relaxed. Most are initialisms, where each letter stands for a word: LMK is "let me know". Some are clipped words (pls, thx), some are letter-number swaps (gr8, 2moro), and a few are pronounced as words (YOLO, FOMO).

Five of the most common examples:

Meanings below are as commonly used in English on 2026-11-01. Slang changes quickly, and the same letters can mean different things in different communities, so context matters.

The golden rule: match the register

Register means how formal your writing is. A quick guide:

When in doubt, write the full phrase. A reader who does not know an abbreviation will lose time or misread your message, while a full sentence costs you only a few extra characters.

Texting abbreviations by group

Laughing and reacting

Making plans and staying in touch

People and relationships

Opinions, advice and summaries

Plus the letter-number forms gr8 (great), 2moro (tomorrow), b4 (before), l8r (later) and u (you). These look very informal and are best kept to personal texts.

Which abbreviations are safe at work?

Some abbreviations have become standard in offices. Others can damage your tone.

Workplaces differ. A start-up Slack and a law firm's email system set very different norms. A good habit is to copy the level of formality your manager and clients use, and to be a little more formal than they are.

Abbreviations to avoid in emails

In emails, especially to people you do not know well, write full words:

• Instead of "pls send ASAP", write "Please send this as soon as you can, ideally by Friday." A deadline is clearer than ASAP.
• Instead of "LMK", write "Please let me know."
• Instead of "FYI", write "For your information" or "I am sending this for your reference."
• Instead of "thx", write "Thank you."

See our guides to email etiquette and how to end an email for sign-offs and tone, and Latin abbreviations for the formal ones (e.g., i.e., etc.) that are fine in professional writing.

Before and after: rewriting a text for work

Casual version:

"hey LMK if u can do fri, ngl i'm swamped rn but IKR the deck is due EOD thx"

Workplace version:

"Hi Priya, please let me know whether you are free on Friday. I am very busy at the moment, but I understand the presentation is due at the end of the day. Thank you."

Notice what changed: complete sentences, a greeting, a name, one clear request and no abbreviations that could be misread.

Regional slang: UK, US and Australia

Slang is local. Abbreviations travel well across English-speaking countries, but spoken-style slang does not.

United Kingdom

• "Innit" (isn't it) tags a statement in speech and texts.
• "Cheers" means thanks or goodbye.
• "Mate" is a friendly form of address.
• "Gutted" means very disappointed.
• "Knackered" means exhausted.
• "Tbf" (to be fair) is very common in British chat.
• "Quid" means pounds (money).

United States

• "Y'all" means you (plural).
• "Ghosting" means ending contact without explanation.
• "Salty" means resentful or annoyed.
• "Lowkey" and "highkey" mean slightly and very much.
• "Bet" means okay or agreed.
• "Cap" means a lie ("no cap" means truthfully).

Australia

• "Arvo" means afternoon.
• "Servo" means petrol station.
• "Heaps" means a lot.
• "No worries" means you're welcome, or it's fine.
• "Reckon" means think.
• "Brekkie" means breakfast.

If your reader is in another country or from another generation, avoid regional slang. Some terms mean different things in different places: "pants" are trousers in the US but underwear in the UK; "rubber" is an eraser in the UK.

How abbreviations are punctuated and capitalised

Texting abbreviations are usually written in lower case in casual chat (lol, lmk) and in capitals in more formal contexts (FYI, ETA). When you must use one in a professional message, capitals look more deliberate. TL;DR has a semicolon and sometimes a colon after it: "TL;DR: the vote passed." Dotted forms such as "L.O.L." are not used.

An initialism like FYI takes "an" when it begins with a vowel sound: "an FYI", "an ETA". "A TL;DR" is spoken as the letters "tee-ell-dee-arr", so "a" fits.

Common mistakes with slang and abbreviations

1. Assuming everyone knows them. Older readers, new colleagues and non-native speakers may not.
2. Using the wrong meaning. PM can mean "private message", "prime minister", "project manager" or "afternoon".
3. Sending emotional messages in abbreviations. A reply of "k" or "fine" can seem cold; type a full word or a short sentence.
4. Mixing registers. A formal paragraph followed by "lol" looks careless.
5. Using swear-word abbreviations in public. LMAO, WTF and AF can offend in professional or school settings.
6. Over-use. A text where every other word is shortened is tiring to read.

Check your writing with AdeptWrite

If you have a draft full of chat shorthand that needs to become a professional message, the Tone Changer offers Formal, Office and Casual modes and rewrites a text into the register you choose; review the result yourself, because a tool cannot know your workplace culture. The Email & Letter Writer can help you draft a message from a few notes. To clear typos from a quick message, use the Spell Checker, which works with American, British, Australian or Canadian English. Each tool handles up to 6,000 characters per run.

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