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1 definition by TheNightHawk69

When a guy ejaculates onto his stomach and the jizz slides down and wells in his belly button. Hence, gene "pool".
Guy 1: Dude, today I jerked it onto my chest and my jizz filled up my belly button!

Guy 2: I wish I could gene pool, but I have an inward belly button :/
by TheNightHawk69 January 30, 2009