Slang meaning
What does TL;DR mean?
TL;DR stands for “too long; didn't read.” It started as a jab at long posts, but today it mostly labels the short version: a one- or two-line summary at the top or bottom of a long caption, post or email.
Updated 6 October 2026
“Too long; didn't read”: once a complaint about long posts, now mostly a label for a quick summary of one.
What TL;DR can mean
1. Here's the short version
The common use now. A writer puts “TL;DR:” in front of a one-line summary so skimmers get the point: “TL;DR: the studio is moving, classes restart on the 14th.” At the top it works as a preview, at the bottom as a wrap-up. Adding one to your own long post is considerate, not rude.
2. I didn't read that
The original sense. Replying “tl;dr” to someone's long message says you skipped it, and it usually stings. In a heated thread it brushes off an argument without engaging with it. Between friends who know they ramble, it can be gentle teasing.
3. Can someone sum this up?
With a question mark, “tldr?” asks for the gist of a long thread, article or group-chat saga you missed. It's the polite cousin of the put-down: you aren't refusing to read, you're asking for the headline first.
How people use it on Instagram and Facebook
Long captions and carousels
Creators who write long captions often end with a line like “TL;DR: save this and use the checklist on slide 6.” Instagram cuts captions off after a couple of lines in the feed, so some put the TL;DR first, where people will actually see it.
Facebook group posts
Long posts in buy-and-sell, neighbourhood and parenting groups often finish with a TL;DR, so members can spot the question, the price or the lost pet at a glance before deciding to read the rest.
Replies in comment threads
A bare “tldr” under someone's long comment is the dismissive version. On a brand account, answering a customer's long message that way would read as rude. Summarising their message back to them shows you did read it.
TL;DR in real conversations
- CaptionWe tested twelve lunchboxes for a month. TL;DR: the cheapest one leaked least.
- Instagram commenttldr?Short version: we move on the 3rd, same hours, new address in our bio.
- Direct messagesorry for the essay 😅 tldr i can't do saturday but sunday workssunday's perfect
- Facebook commentTL;DR: grey cat missing near the library since Tuesday, answers to Pepper. Please message me if you see her.Shared to our street group. Hope she's home soon.
- Instagram commenttl;drFair, it's a long one. The main point is in the first line.
How to reply to TL;DR
Where it comes from
TL;DR was in use on internet forums by the early 2000s, mostly as a complaint about walls of text. Posters began adding their own TL;DR lines to head off that complaint, and the summary sense took over. Oxford's online dictionary added the term in 2013, in the same update that brought in FOMO and selfie.
Questions people ask
Is it TL;DR, TLDR or tl;dr?
All three are used. The semicolon version is the traditional spelling and the one dictionaries list, but on a phone many people skip it and type “tldr.” Capitals or lowercase make no difference to the meaning.
What does TL;DW mean?
“Too long; didn't watch.” It's the video version, used under long videos, podcasts and live streams. Like TL;DR, it can be a request (“tl;dw?”) or a summary someone posts for everyone else.
Should the TL;DR go at the top or the bottom?
Either works. At the top it acts like a headline, which suits captions that get cut off. At the bottom it wraps up for people who read everything. Keep it to one or two sentences, and make it state the actual point.
Is it rude to answer someone with “tl;dr”?
Usually. It tells the person you didn't bother reading, and in a disagreement it's meant to dismiss them. If you really don't have time, “can you give me the short version?” asks for the same thing kindly.
Related slang
- FYIFor your information: a heads-up that passes on a useful fact, and sometimes a pointed way to correct someone.
- ICYMIICYMI means “in case you missed it”: a label for something shared earlier that you are bringing back.
- BTWBy the way: it adds an aside, switches topic, or slips in a reminder as if it were an afterthought.
- IMOA way of saying “in my opinion”: it marks what you say as your own view rather than a fact, softening advice and disagreement.
- IIRCA hedge meaning “if I recall correctly”: the writer is going on memory and admits they might be wrong.
- AFAIKAFAIK means “as far as I know”: a hedge that marks a statement as the writer’s best understanding, not a guarantee.
More slang meanings
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