TL;DR

or TLDR, tl;dr, tldr

[ tee-el-dee-ahr, teel-deer ]

abbreviation for

1. too long; didn't read:
   1. (used, especially online, to introduce a summary of a lengthy text.)
   2. (used as a comment, usually considered rude, on an online post, text message, etc., that is thought to be too lengthy.)

noun

1. a summary of a lengthy online post, text, article, etc. (often used attributively):

   I'll do a longer writeup on this game in the thread, but the TL;DR is that it's exciting but pretty violent.

   For people who don't have time for the whole thing, here is the tldr version.

Word History and Origins

Origin of TL;DR¹

First recorded in 2000–05; from its use in digital communications