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1.
when hooking up, it is the act of cupping ones hand to act as a receptacle for ejaculate when rubbing one out. This prevents jizz from getting on the sheets, couch, floor, or unwilling participants.

note: not applicable to relationships. swallowing is de rigueur in such situations
My hook up last night was taking forever, so I busted out the polite hand cup, shot my load, and left.
by rngdfcker April 17, 2011