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Pokemosh, stemmed from Poke Mosher, similar to Pokemon, which means Pocket Monster. Pokemosh basiclly means Pocket Mosher.

Pocket Mosher or Pokemosh are usually young Rock or metal fans, not actually knowing anything about there style or music genre who just wear generic hoodies of "Metallica", "Slipknot", or "Nirvana".
"Look at that Avril, what a pokemosh!"
by Nik_Doof February 05, 2005