Getting 0wned, 0wnd, or 0wnzd means getting your arse severely beaten, either mentally, physically, emotionally or other. A word often used by those who deem themselves to be of the l33t status.
dude 1 gets beaten on video game
dude 1: damn, I got 0wned
dude 1: Haha! you got 0wned! *is laughing at the misery and humiliation of dude 2*
*dude 1 gets totally
blown out in a heated discussion* SHIT! he totally