It's an act of totally whooping someone's ass
in wii sports for the wii
. More specifically doing it with your own mii
and getting the satisifaction that the fact that you have no life
and have no chance at getting a girlfriend
has finally paid off in some form.
Player 1: Damn you beat me good... and wih your own mii
Player 2: Damn right son! You just got mii'd!