kicking one's ass, referring to the action of jumping and attacking in the game Super Smash Brothers.
AKA: MEGA RAPE
Fox and Mario enter, Mario is the only contender left...
Mario: "I just B upped yo ass"
Sometimes used for blaze up (smoke).
Like it if you want, some people say it.
Most of the time used on statuses for stuff like aim, msn, whatever.
Dave's status: AFK... b up