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The act of preforming the jackhammer from behind while a girl is puking her guts out in the toilet after a hard night of drinking. The contractions of the naughty muscles during a heave must be a delight to be experienced. Always hold her hair out of her face and rub her back (two-ball compound optional) for extra points and to show her that you really did care!
Guy #1 "Dude, I picked up that cum dumpster at the bar last night and got a puking jackhammer!"
Guy #2 "No shit?" "How was it?"
Guy #1 "My unit is shaped like a peanut today!"
by frainslug February 02, 2006
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