an overused word that used to be cool but now makes most people want to slap the shit out of anyone who says it. It is now used mostly by ten to twelve year old's hoping to be cool. *coughcough*
People also use this as a greeting, which I don't get.
Danny: HAY NICK, I GOT ALISHA HIGH LAST NIGHT AND GOT HER TO LOSE HER VIRGINITY, CAUSE LIKE, YOLO.
Nick: *glares at him then walks away*