What is Mattress Pumper?
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A young guy, shy, loner, usually a teenager, often a geek, who does not have a girlfriend and spends far too much time alone, often at home in his bedroom, when other people his age are out having a good time. The implication being that he is
An underage drinker (under 18) is in a bar and bumps, into a grown man who shouts at him, "Piss off, you little mattress pumper".
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A gang formed in Washington (west coast not to be confused wit D.C.)Made to keep peace on the streets and clain whats ours. KSP for shor..
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Game in which two people grip hands like they were arm wrestling, but instead they take turns slapping each others hand as hard as possi..