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refers to the putrid smell that eminates from the groinal region after a night of festering in one's own sweat and other bodily fluids. the lower equivalent of morning breath.
person 1: "so dude, sally stayed over last night and in the morning i decided to do a little donut diving."

person 2: "wtf man, that morning crotch will kill ya."

person 1: *shivers*
by jjefferson13 December 08, 2007