Sexual act in which a man or woman eats out a girls ass while sticking his thumb in her ass and 2 fingers in her vagina.
Oh my God, theres that chick I gave a Rusty Bowling Ball to on Tuesday.
by eddie addams January 31, 2011
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When you pull your dick out of an anus and you see that they have diarrhea.
It's a rusty bowl, alright.
by rustybowl November 26, 2017
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