A) "Too long; didn't read.", meaning a post, article, or anything with words was too long, and whoever used the phrase didn't read it for that reason.

B) Also used by someone who wrote a large posts/article/whatever to show a brief summary of their post as it might be too long.
a)
Guy One: Did you read that book for English class?

Guy two: No, tl;dr.

B)
Guy one: Cake is a form of food that is usually sweet and often baked. Cakes normally combine some kind of flour, a sweetening agent (commonly sugar), a binding agent (generally egg, though gluten or starch are often used by vegetarians and vegans), fats (usually butter, shortening, or margarine, although a fruit purée such as applesauce is sometimes substituted to avoid using fat), a liquid (milk, water or fruit juice), flavors and some form of leavening agent (such as yeast or baking powder), though many cakes lack these ingredients and instead rely on air bubbles in the dough to expand and cause the cake to rise. Cake is often frosted with buttercream or marzipan, and finished with piped borders and crystallized fruit.1

Cake is often the dessert of choice for meals at ceremonial occasions, particularly weddings, anniversaries and birthdays. There are literally millions of cake recipes (some are bread-like and some rich and elaborate) and many are centuries old. Cake making is no longer a complicated procedure; while at one time considerable labor went into cake making (particularly the whisking of egg foams), baking equipment and directions have been simplified that even the most amateur cook may bake a cake.

tl;dr: Cake is a baked, yummy sweet.
by Soonmme July 15, 2008
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Too Long; Didn't Read

Used in reply to a post and/or comment or other written material that dragged on way too long about things that weren't very important.

Also sometimes used by trolls on posts that are longer than their attention span, or in an argument or flame war when one person can't come up with a comeback.

Also usable on your own lengthy post at the end followed by a quick summary of the above material as a courtesy to people who might not want to read the entire thing. Essentially the same as writing "In Summary," when used this way
1. Guy #1: Did you read that book for english class yet? I'm still on page 537.
Guy #2: tl;dr. The book is mostly made of random extraneous details. I bought the study notes instead, they were only 50 pages long.

2. Troll: lulz ur such a fag
SomeGuy1: It really is pathetic that you would make accusations about my sexuality instead of coming up with a legitimate argument. I wonder if you even watched the video before posting.
Troll: tl;dr LOL
SomeGuy1: How old are you, 5?

3. (lengthy post)
tl;dr, Cats are awesome.
by TheAbyss May 8, 2012
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tl;dr : Too long, didn't read.
"Did you read the fourth definition, it was quite witty!"
"no tl;dr"
by Aleksei Nikolaevich Tolstoi November 17, 2007
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Literally, "Too long; didn't read"

Said whenever a nerd makes a post that is too long to bother reading.
"omg you postwench. i can only say one thing in response - tl;dr"
"tl;dr...why dont you give up on your unabridged edition of War and Peace or at least stop posting it here?"
by DisgruntledJoe November 21, 2003
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Too Long; Didn't Read

Literally translates to: That was too long to read.
Really translates to: I'm too lazy to read the entirety of what you said, but I still want to say something.

Now, instead of just dropping capitals the modern internet communicator also drops tiresome reading! The time savings will be incredible.
Person A: Hi, do you know anything about where Jamie and Brad are?
Person B: tl;dr
Person A: Uh... How should I have said that?
Person B: do u no where jamie n brad r
Person A: AGH... It burns!
by Gogo May 16, 2005
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"too long; didn't read."
1. The inability to accept, understand or pay attention to information when not separated by a header.
2. The ability to arbitrarily read 400 small posts but not a long one.
3. A sign of ADD or lack of reading capability.
4. A very cheap response and an indication of lack of wit.
5. 90% of the time: A lie.
6. A desperate attempt at a comeback used by people who just can't think of one.
7. Usually used by people who've been torn apart verbally but want one last attempt at looking witty.
8. Total failure at #7.
7. A sign that, not only is someone too lazy and stupid to read but, clearly, too lazy and stupid to even type out four words indicating such.
9. Collect every "tl,dr" post online, and you'll have a good estimate of the number of lazy idiots on Earth, who currently have Internet access.
10. Should really be:
"Too Lazy, Don't Read."
or,
".....I got nut'n!"
~ ME:
.....Therefore you suck fabulous donkey shit cock.
~ "Smart Troll" Not Used To Being Beaten:
*yawn* tl;dr
~ Me:
...Right, well, as believable as that is, you've got time. Just sound the bigger words out. Now I can see why your friends say you're so "smart".
by FlowersInMidgar May 29, 2007
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Stands for "too long, didn't read". It can be interpreted in different ways depending on the context.

1. When responding as a first post, and only as a first post, on a thread, it means the OP's post was so long and unimportant or uninteresting that the user deemed it unworthy of his/her time. If the topic really is unimportant and uninteresting, and long enough to need more than a minute to be read and understood, the user ends up looking clever, though on some communities the user may end up looking like a troll or a lazy bum.

2. When responding during an already ongoing discussion where others haven't used the term, it means the user is trying to diminish the topic's importance or entertainment value, but considering that such a strategy won't work in a discussion where people are actually participating, the user ends up looking like a dipshit.

3. When responding with it during an argument, it means that the user in question wants to win the argument by stating that what the other person is saying is so worthless it's not worth reading. But by evading the argument instead of confronting it directly, it becomes obvious that the user got owned.
1.

- someguy1: *posts a very large and boring flow chart about people in facebook*
- User: tl;dr
- others: I second that.

*on a community where users actually like these things*
- User: tl;dr
- others: If you think it's too long then GTFO, retard.

2.

- User: tl;dr
*some ignore dipshit and continue discussion, some others tell the dipshit to GTFO, everyone will report the post to mods*

3.

- someguy1: *totally proves that he's right and/or User is wrong*
- User: tl; dr
- others: hahah he got pwned and he's chickening out, what a pussy!
by Mecha-Kucha October 7, 2010
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