Having a/your penis in a womans vagina while simultaneously having your testicles lodged in her anus.

See also keeping the dog in the bathtub
OH MY GOD! That guy has his dick in her twat, and balls in her ass! What a Plum Fuck!
by Dookie April 1, 2005
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plum fucking occurs when a guy fucks a girl in the ass, but has his ball inside her pussy at the same time. needs to be performed doggy style for optimum performance.
you mum loves it when i give her a good plum fucking
by Russthedude July 11, 2008
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