tl;dr
word type: acronym
- Abbreviation for "too long didn't read"
What the Poster is Really Saying:
Your post was so long I figured you don't understand brevity and I can't be bothered with your story anyway.
Another Point to Note
Sometimes people who write "tl;dr" actually DID read the post and they don't consider their term usage to be a lie. The reason is that term can also mean "that was a really long post."
Credit
Submitted by Wetdog