Well you might as well sit down and shoot yourself because
you now have another reason to unload a minigun on your face.
Yolo stands for "you only live once" which is pretty fricken obvious, and it is frequently spammed on message boards and Facebook by teenagers and pre-teens.
This is often used at the end of Facebook status and as a Hashtag on Twitter, #YOLO
On Facebook:
"Getting super drunk with tha girlies!!! YOLO"
"night out at the club. YOLO"
"SO EXCITED FOR THE BIG NIGHT. YOLO!"
"Gettin #supercrunk with @AlsoDoesAnalAndrea #YOLO"
one of the best things that can come out of someone's mouth, sure they might be slowly dying in a horrible car wreck like 2 seconds after saying it, but YOLO
A reason that somehow permit a person to do/act something regardless of the consequences when there are seemingly no other reasons.
Person A: I think I want to try cutting myself
Person B: Why do you want to do such stupid thing?
Person A: Because...erm..erm..YOLO! (You only live once)