Definition of TL;DR

Too Long; Didn’t Read: used in response to a chain of text, article, or other lengthy post that is thought to be too long. It can also be used by someone who is writing a long thread.

online post, text message, article, etc. That is thought to be too lengthy, and usually taken as a rude comment, or used by the writer before a summary of lengthy text.

TL;DR used in a sentence

‘’I haven’t checked my phone for hours, TL;DR, can someone give me a summary of this conversation?’’

‘’I haven’t been able to keep up with this thread (TLDR).’’