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15.
One of the best things ever invented. The perfect way to kill off the retards in this world.
Person 1: I'm going to jump off a bridge 'cus you know, yolo.
Me: You know what, be my guest.
by Chrome shelled November 11, 2012
 
16.
Acronym for You Only Live Once. Mainly used to defend doing something ranging from mild to extreme stupidity.
Mild stupidity:

Friend: Dude, you probably shouldn't smoke that joint you found on the ground.
Me: Fuck it, YOLO.
Extreme stupidity:
Friend: Dude, you probably shouldn't be posting random definitions on urbandictionary while you're stoned.
Me: Fuck it, YOLO.
:)
by whatwhatwhat77 February 25, 2012
 
17.
an acronym meaning You Only Live Once, usually used to excuse stupid actions.
"Brett, no, don't facecheck that bush! A Garen could be in it."

"Fuck dat shit, YOLO!"
by dayundalion June 21, 2012
 
18.
a word of which means "you only live once" but actually means "you only get one life, so why not do these idiotic things that could shorten it, or even better get us jailtime for a large percentage of it"
anass rhammar: I'm gonna jump!

Willie stroker: no don't, you will die!

anass: YOLO !
by achmedhadalambandhebangedit July 09, 2012
 
19.
Stands for "You Only Live Once"

Created by Douchebag teenagers and faggot frat guys to excuse their idiotic actions.
Normal Guy: Dude, don't bang that chick, she is passed out.

Frat Douche: YOLO, Bro!
by Tebown September 11, 2012
 
20.
Acronym for You Only Live Once.

Now get off your computer and go outside.
George came to the party with the word Y.O.L.O. on his shirt and got things started.
by thc420 December 27, 2009
 
21.
You Only Live Once
Yolo so are you ready to go boys and girls
by Mr. be safe always June 16, 2014