Internet Slang Glossary: 200+ Online Abbreviations and Terms

Few corners of the history of English have produced as many new words in as short a time as the internet. Every platform, subculture, and meme cycle leaves behind a fresh layer of vocabulary, and most of it sticks around in at least some form. What started as typing shortcuts in 1990s chat rooms has grown into a living dialect with its own grammar, humor, and shifting in-groups. This guide collects the terms you are most likely to run into online, explains where they came from, and shows how they get used in practice.

Why the Internet Speaks Its Own Dialect

The first wave of internet slang was born out of constraint. Bulletin boards, IRC channels, and early mobile texting all charged a real cost for every keystroke — time, characters, or actual money per message. Abbreviations such as "BRB," "AFK," and "LOL" were the cheapest way to keep a conversation flowing. Once the constraint loosened, the shortcuts stayed, because they had picked up something language always wants: texture. "LOL" no longer means you are literally laughing, but it softens a sentence in a way a period cannot.

The reach of online slang has long since spilled off the screen. "Ghosted," "FOMO," and "going viral" now show up in job interviews, op-eds, and your aunt's group chat. The line between "internet English" and "normal English" has blurred to the point that younger speakers can no longer really tell the two apart — and for them, that is the point.

Everyday Shorthand

Day-to-Day Shortcuts

• LOL — Laughing Out Loud. The granddaddy of internet abbreviations, now more of a conversational filler than a real claim of laughter.
• BRB — Be Right Back. Used when you step away from a chat or stream.
• OMG — Oh My God. A catch-all for shock, delight, or performative surprise.
• IDK — I Don't Know.
• IMO / IMHO — In My Opinion / In My Humble Opinion. Often prefaces a take the writer is not actually humble about.
• BTW — By The Way.
• FYI — For Your Information. Older than the web, but at home on it.
• NVM — Never Mind.
• TTYL — Talk To You Later.
• TBH — To Be Honest. Signals an unfiltered opinion is coming.
• ICYMI — In Case You Missed It. Common on social media when resharing.
• TL;DR — Too Long; Didn't Read. Either a complaint or a summary of a long post.
• NSFW — Not Safe For Work. A warning label for risqué or graphic content.
• DM — Direct Message. The private inbox on most social apps.
• AMA — Ask Me Anything. A Q&A format popularized by Reddit.

Taking Sides

• IKR — I Know, Right? Enthusiastic agreement.
• AFAIK — As Far As I Know. Hedges a claim when you are not 100% sure.
• THIS — One word of total endorsement, usually pointing at a quoted post above it.
• SMH — Shaking My Head. Silent disapproval, usually mild.
• FTFY — Fixed That For You. Posted above a tweaked quote, often as a dig.

Words for Feelings and Reactions

• Cringe — Painfully awkward or secondhand-embarrassing. Also a verb: "I cringed so hard."
• Salty — Sour or resentful about something small. "He is still salty about losing that fantasy draft."
• Slay — To absolutely nail something. Often applied to outfits, performances, or clapbacks.
• Snatched — Looking sharp — especially a flattering outfit or hairstyle.
• Based — Refreshingly willing to hold an opinion regardless of who it annoys.
• Vibe — The overall feel of a place, person, or moment. A "vibe check" is a quick read on someone's mood.
• Mood — Something you relate to completely. A photo of a cat flopped on a keyboard captioned "mood" is the whole joke.
• Shook — Rattled or emotionally knocked off balance.
• Dead — Shorthand for "that destroyed me with laughter." Also "I'm crying" and "I can't."
• Oof — A sympathetic wince for someone else's misfortune, or your own.
• Yeet — Originally a hype cry, then a verb for throwing something hard and without ceremony.
• Sus — Suspicious. Turbocharged into everyday use by the game Among Us.

Terms for Online Behavior

• Ghosting — Vanishing from someone's messages without explanation, usually in a dating or friendship context.
• Lurking — Reading a community without ever posting in it. Most forum users are lurkers by a wide margin.
• Catfishing — Pretending to be someone you are not online, often with stolen photos and a fake backstory.
• Trolling — Deliberately stirring up anger or arguments for entertainment.
• Doxxing — Leaking someone's real name, address, or other private data to strangers.
• Flexing — Showing off money, status, or achievements. Often paired with "hard" as in "flexing hard."
• Humble brag — A boast dressed up as a complaint. "So exhausted — my third promotion this year is really wearing me out."
• Clout — Online influence, followers, or attention-as-currency. "Clout-chasing" is doing anything for it.
• Cancel culture — The collective pushback that follows when a public figure is seen as crossing a line.
• Simp — Someone who showers affection on a person who is not returning it in kind.
• Stan — A devoted, sometimes obsessive fan. The word comes from an Eminem song and works as both noun and verb.
• FOMO — Fear Of Missing Out. The tug you feel scrolling through other people's weekends.
• JOMO — Joy Of Missing Out. The relief of being home while everyone else is at the crowded event.

Vocabulary from Gaming

• GG — Good Game. Typed at the end of a match as a (usually) polite send-off.
• Noob / Newb — A beginner, from "newbie." "Noob" leans insulting; "newb" is friendlier.
• OP — Overpowered in games; Original Poster on forums. Context sorts it out.
• Nerf — A balance change that weakens a weapon, class, or character, named after the foam toy brand.
• Buff — The opposite of a nerf — a tweak that makes something stronger.
• NPC — Non-Player Character. Online, it doubles as a jab at someone who seems to run on a script.
• Respawn — To come back to life after being killed in a game.
• Grind — Repeating the same task for hours to level up or farm loot.
• Lag — The stutter between your input and what the server actually registers.
• Rage quit — Slamming the controller down and closing the game mid-match.
• Speedrun — Beating a game as fast as possible, often with wild skips and glitches.
• Easter egg — A hidden joke or reference tucked away in a game or piece of software.

The Vocabulary of Memes

• Meme — Coined by Richard Dawkins in The Selfish Gene (1976) as a "cultural gene." Online, it means a template — image, clip, or phrase — that gets endlessly remixed.
• Viral — Spreading from share to share the way a contagion spreads between hosts.
• Dank — Once a synonym for damp, now a stamp of approval for a meme that is unusually funny or weird.
• Copypasta — A chunk of text people paste over and over into threads, usually as a running joke.
• Rickrolling — Baiting someone into clicking a disguised link to Rick Astley's "Never Gonna Give You Up."
• Shitpost — A post that is intentionally ridiculous, low-effort, or nonsensical for comedic effect.
• Ratio — When the reply to a post outperforms the post itself in likes, usually because the crowd disagrees.
• Chad — A confident, capable guy. The tone ranges from genuine compliment to tongue-in-cheek mockery depending on the subreddit.

Quickfire Chat Shortcuts

• LMAO — Laughing My Ass Off. A louder sibling of LOL.
• ROFL — Rolling On the Floor Laughing. Now a bit dated but still around.
• GOAT — Greatest Of All Time. Once shouted about Michael Jordan; now applied to everything from tacos to Taylor Swift.
• YOLO — You Only Live Once. Peaked in the 2010s as a justification for questionable decisions.
• ELI5 — Explain Like I'm 5. A Reddit staple meaning "keep the jargon off."
• TMI — Too Much Information. When someone overshares.
• IIRC — If I Recall Correctly. Hedges a claim about something remembered.
• FWIW — For What It's Worth.
• NGL — Not Gonna Lie. Often precedes a mildly spicy opinion.
• FR — For Real. Doubled as "fr fr" for extra sincerity.
• RN — Right Now.
• LMK — Let Me Know.
• HMU — Hit Me Up. Slide into my messages.
• WYD — What (are) You Doing?
• No cap — No lies, no exaggeration. The opposite of "capping," which means lying.

Slang by Generation

Internet slang tends to group by the generation that grew up online around it:

Millennial Favorites

• Binge-watch — Plowing through an entire season in one weekend.
• Adulting — Jokingly flagging that you just paid a bill, cooked a meal, or went to the dentist.
• Extra — Over-the-top, doing the most, dramatic beyond what the moment calls for.
• Basic — Painfully mainstream — pumpkin-spice-everything energy.
• FOMO — See above. Millennials did not invent the feeling, just the acronym.

Gen Z Favorites

• Bet — "Sure," "deal," or "understood." A one-word yes.
• Rizz — Charm, especially the flirty kind. Can be a verb: to "rizz someone up."
• Bussin' — Delicious, especially about food. "These tacos are bussin'."
• It's giving… — Used to nail down the vibe of something. "It's giving main character energy."
• Rent-free — Occupying your thoughts with no payment owed. "That commercial lives in my head rent-free."
• W / L — A win or a loss, slapped onto anything from a test score to a dinner choice.
• Ate (and left no crumbs) — Delivered a flawless performance, with nothing left to critique.

The Mechanics Behind New Slang

The ways the internet coins words are not new — they are the same tricks English has always used, just sped up:

• Clipping — Chopping a longer word: "sus" from "suspicious," "fam" from "family," "sesh" from "session."
• Abbreviation — Taking initials and treating them as a word: BRB, LOL, TBH.
• Blending — Fusing two words into one: "hangry" (hungry + angry), "frenemy" (friend + enemy), "brunch" long before the internet was around.
• Semantic shift — Taking a word and moving its meaning: a "ghost" used to be a spirit; now it is also what someone does when they stop replying.
• Metaphor — Borrowing imagery from the physical world: "viral" from disease spread, "troll" from the creature under the bridge.
• Onomatopoeia — Sound-first coinages: "yeet," "oof," "brrr."

These same moves have minted English words for centuries — online life just shrinks the turnaround from generations to weeks. If you like tracing this sort of thing, it pairs well with vocabulary building in general.

Crossing Into Everyday English

Plenty of terms that started on screens now sit in print dictionaries without a blush. "Selfie," "hashtag," "binge-watch," "ghosting," "catfish," "FOMO," and "LOL" all cleared that bar, joining the long tradition by which slang words from sailors, soldiers, musicians, and immigrant communities have reshaped English from the margins inward.

What is unusual is the speed. A term can move from a single subreddit to a dictionary entry in two or three years, a trip that once took a word most of a century. Editors now track Twitter and TikTok the way earlier generations tracked newspapers and radio.

Final Thoughts

Online slang is English with the volume turned up — faster, more playful, and less patient with formality than the written language most of us learned in school. The terms above will not all survive the decade, and a handful are probably being replaced as you read this. That churn is part of the appeal. Whether you are decoding a group chat, catching up on a meme, or just curious about how language actually changes, this glossary gives you enough of the map to start reading the signs. The internet is still young, but its fingerprints on the English language are already everywhere.