A directional move used in Super Smash Bros to achieve extra height after a double jump.
Kirby used his Up B to get back onto the level.
by Balls Kolano October 08, 2008
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Amanda says: What up B?
Shellee says: notta girlie what it is ?
by Shellee July 03, 2006
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Verb used to describe the act of randomly bailing from any situation with no explanation or reason.
"Hey, where did Brewy go?"
"I dunno man; I think he just Up-and-B'd!"

"Fuck it, Imma Up-and-B this shit."
by Red Leather April 04, 2010
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B Up A. Refers to Modern Warfare (MW2, COD4, World at War). It means to "give up" or "tap out" and back out of the lobby before the game starts. You can tell someone to "Bupa" (sounds like "Boopa") if you want them to leave.
Example 1:"Man, you guys have no skill- you keep using your noob tubes". "Noob tubes? These are pro pipes. B UP A"

Example 2: "I don't noob tube, I bro-pipe!"
by Noob Tuber March 31, 2010
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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"
by jtwh310 June 13, 2008
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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
by Felonblazer March 01, 2009
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