Overview
"YOLO" is an acronym for "you only live once". It became a popular internet slang term in 2012.
Emergence of acronym
Adam Mesh, a contestant on the reality TV series Average Joe, produced and sold a line of YOLO-branded clothing and accessories in the early 2000s.
In 2012, the phrase was a subject of graffiti, hashtags on Twitter, pranks, tattoos, music, television shows and merchandise.
The acronym was popularized by Canadian rapper Drake, who planned to release a 2011 joint mixtape titled YOLO along with American rapper Rick Ross. To promote this mixtape, "YOLO" was mentioned prominently on several of their tracks such as "The Motto", released on November 29, 2011, with the aim of promoting the tape. This use is said to have elevated the word into prominence and common colloquial use. In late 2012, Drake expressed a desire to obtain royalties for use of "YOLO" due to the proliferation of merchandise bearing the phrase and lyrics from his song, which have been commonly seen at stores such as Walgreens and Macy's, but he does not own a trademark on the word.
From Wikipedia (CC BY-SA 4.0).