A "Jack Dempsey" refers to one beating his meat very aggressively, as the legendary boxer Jack Dempsey flogged his opponents.
Dude, I got so excited over that midget porn I was watching that I stole some face cream from my sister's make-up bag and gave myself a "Jack Dempsey". Now my pecker is sore.
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Get the Cormac Dempsey mug.The most practically useless, laziest teacher you ever have. And although he is practically a hoarder, and refuses to throw anything away, you'll get lectured for 20 minutes if you drop 1 scrap of paper on the floor.
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