B up 

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"

B up by jtwh310 June 14, 2008

b up 

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

b up by Felonblazer March 1, 2009

B Up 

about to leave

" b up bxxd i finna hit you later"

B Up by #imher April 3, 2021

b-up 

A short form of the word "break up". Often used on messaging over electronics because of the laziness of a person.

luke: dude i can't believe that she b-up with me
robert: don't cry. it's weird.

b-up by RYANNN. April 28, 2007

B-up 

behind you but up. Used mostly when talking face to face with someone.

The poster is B-up you.

B-up by TheSunnysXD October 25, 2022

B up A 

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!"

B up A by Noob Tuber March 31, 2010

cas-b-up 

Short for casual button up shirt. A style that can be worn for most occasions.

Her: You look nice today.

Him: It’s just a normal cas-b-up.

cas-b-up by TheDon27 April 21, 2018