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The action of dropping the head of one's penis or the bellend into another man's beverage when they're not looking. Originally when John Christopher Downing put his penis head into Bob Freudenberg's coffee when Bob was taking a shit.
Bob-"This coffee tastes like shit"
*laughter*
Chris-"Well you just got The Downing Dip"
by SuperJew of Mid Mo February 08, 2008
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