1 definition by Mr.Mainst

Top Definition
the act of jumping n'sync with another person on a trampoline and desending on your rear end, creating a bomb-like form and sending one of you flying in to the air
Mainst was jumping on a trampoline with Mr.Trombone, they agreed to do a butt bomb, sending Mainst flying in the air
by Mr.Mainst March 05, 2010

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