Top Definition
when a guy cums in ur butt and u cum in his..
keyur:hey what was that thing u did to me last night ?
shaunak:hey we played bum tarts!!i love you!
by punani patel July 23, 2011
a tart that is most-definitely made out of bum. (this refers to a gluteus maximus made into a pastry). it taste like lose.
you, good sir are A BUMTART, and i shall not speak with you.
by Baffle-boy January 04, 2010
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