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A sexual act when a man and a woman push their anuses together. Then either the man or woman begins to poo into the other's anus, then the other poos back poo into the other's anus forever in perpetual fecal bliss.
Dude 1: I totally partook a Reverse Tug of War with your mother last night and twice this morning.

Dude 2: Dude breh man, that is fucking nasty
by Luvs2reversetugofwar April 17, 2010
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