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One who neglects studies, his or her social life, or personal hygiene in order to play a rousing game of Call of Duty on his or her XBOX 360.

They can often do this all night, and get so wrapped up in the game that they reference it in day to day speech.
"You coming out, Joe?"
"Can't, sorry, I'm going home to Smash Cod. For I am a Cod Smasher."
by Dajo42.5 March 24, 2010