When two people press their butts up tight against eachother and poop at the same time. Usually stimulates some sort of sexual arousal.
Person 1: What did you do after the movies last night?
Person 2: I took my girl home and we did a Dirty Walnut until we both passed out.
Person 2: I took my girl home and we did a Dirty Walnut until we both passed out.
by IndianStranger July 27, 2016
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