A game where you yell at the top of your voice "IM WINNING", usually played with more then one person. The winner is the person who shouts the loudest. Often played in public places (library, elevator, movie cinema etc.)
Jamie and Jason were playing I'm winning at the spot, Jason was soon to realize his defeat when Jamie obviously fucked his shit up.
by The kid on the block May 26, 2009
A term people use as an excuse to act like a total douche.

It's also a huge cliche, usually used by talentless young women on reality TV shows.
"No, I don't care what they say or think. Screw them. And you know it's like cause I'm not here to make friends, I'm here to WIN... yeah, yeah..."
by Bobo_Haha December 20, 2009