A term used after dominating someone at an activity. Derived from Chris Costa; a bad-ass mofo who dominates a target or a body with a tactical carbine.
I took your sister out last night, and let me just say she cooks an amazing omelet. Costa'd!!!
The articulate process by which a drunk and horny female, mostly of the promiscuous type in a relationship with another man, grabs the shaft of the male genitalia (aka a boner) with one fist, and then stealthly with the other hand grasps the left or right gluteal while thrusting said male genitalia inside of the vaginal cavity (aka pussy). Girlfriends are not counted in this particular process.
(Dumbed down version)
When a down ass bitch grabs your dick with one hand, your ass by the other, and slam dunks that shit straight into her pussy.
Jeffrey: "Dude... Daniella totally MJ'd me last night..."