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The sexually-charged act of defecating from one anus to another, back and forth to stimulate prostates of both participants. While not strictly a homosexual sexual act, it is more common in gay men than straight couples.
Person 1: Would you like to try the Permanent Moonbase tonight?
Person 2: No, unfortunately, I have diarrhea, it wouldn't pass back and forth properly.
by JasonSchreier February 11, 2012
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