- Source: TL;DR
TL;DR or tl;dr, short for "too long; didn't read", is internet slang often used to introduce a summary of an online post or news article. It is also used as an informal interjection commenting that a block of text has been ignored due to its length.
History
The phrase dates back to at least 2002. According to the Oxford English Dictionary, its earliest known use was in a 2002 message posted on the Usenet newsgroup rec.games.video.nintendo. In 2009, the term appeared in Mo' Urban Dictionary: Ridonkulous Street Slang Defined, a publication based on online crowdsourced slang database Urban Dictionary. Also in 2009, it was listed as a slang acronym in David Pogue's tweet anthology World According to Twitter. The term was added to the Oxford Dictionaries Online in 2013.
See also
Abstract
Attention economy
Attention span
BLUF – bottom line up front
Information overload
Internet culture