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To tell someone they said something stupid or crazy,or there being crazy.Also to tell someone you must be on crack
Joe< Go outside and stand in the cold
Chris< Hell naw it 20 degrees outside
Joe<I dont care
Chris< Nigga you must be on dog food
by Antwon Davis December 31, 2006

Words related to you must be on dog food

dog food dumb ass you must be crazy you on dog food