this is the short form for the phrase "on your own"

Boobs.

It's used on chat room and message boards and crap.

On your own. One might hear this when they've been pushing away their friends and supporters.

Breasts, with nipples in proportion to the actual breasts. Y=cleavage.
There are other sizes, including:
oYo - regular sized nips on little breasts
OYO - large sized nips on little breasts
o Y o - Perfect nipples on a perfect rack.
O Y O - oversized nipples on a perfect rack
o Y o - one breast is larger
o Yo - tits to AVOID! Do not go near to these.

between yoyo and yo
often used as a way to say hello
made up one day by a clever counter-strike player

An indian term for saying "oh my gosh"

what faggots masturbate to when they cant find any good porn on their computer