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The unplummer is an age old classic; The act of sticking your penis into a womans asshole right as she is about to deficate, thus reversing the 'plummers' role of unclogging shit out of a pipe.
Friend 1:That bitch ate the whole goddamn box of Triscuits.?
Friend 2: Sure did...
Friend 1: Does she know that tonight is the night you were going to give her the 'unplummer'?
Friend 2: Suuuuure does...
by Bruce Springstein July 19, 2006
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