Top Definition
A giant bottom that looks as if it could explode from the clothes that are covering it at any moment.
Holy moly, watch out for that BumBomb!
by mrhenhen June 29, 2015
A bomb shoved up someone's ass.
AAAHHH THAT GUY HAS A BUM BOMB! Save Me!
by Steaver370 April 26, 2004

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