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A sudden paroxysm in the penile region. Usually caused by: boner overuse, smashing it by girl riding you, having sex with a full stomach, dehydration.
TbKyle1: Rory: "I've just been stricken with a massive Boner Cramp"
Kyle: "shit dude, stick it in Jello"
by Krytos January 13, 2005
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