Top Definition
The act of ejaculating in a woman's ass crack without penetration after she gives you fellatio.
That Drew Neitzel is such a freak! Last night my friend went home with him and he gave her a Bunzer!
by Karmann69 March 05, 2009
term for ecstasy pill
you up for doin' a bunzer tonight?
by Ge-off May 24, 2006

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