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1 definition by mattiethedrummer616

A player of Call Of Duty: Modern Warfare 2 that exclusively uses the UMP45 sub machine gun. This player will probably also have fall camo and a silencer.
MattiePOSDaddy just killed the whole enemy team with the UMP45? What an ump chump!
by mattiethedrummer616 September 19, 2010
8 2