during sexual intercourse, the male penis suddenly goes flat at an alarming rate before reaching the climax of intercourse, thus making the female unsatisfied, usually but not limited to a "what the fuck was that, you erectly dysfunctional quylthulg(pulsation flesh mound)???"
man1: dude, i heard man3 had snowman sex!
man2: no friggin way! he always talks a big game!
man3:dude, im right here.
by Andrew Mac-Daddy July 27, 2009

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