Top Definition
The result of playing Call of Duty at ungodly hours in the middle of the night. Symptoms are usually temporary and include mental fatigue, inability to think critically and a lack of concentration on or memory of anything other than the round of deathmatch currently in session.
Peter couldn't remember what he had for lunch today, or what his sister's name was, while we were playing Call of Duty at 3 am. He probably just had cod brain.
by Bill the Bobder February 21, 2011
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