Top Definition
Reasoning or advice that is either contradictory or only makes sense to your grandmother. Most likely spoken by someone of old age
Person 1: Jimmy Rollins got injured during stretches the other day...He'll be out for two months.
Person 2: We'll he never should've stretched in the first place
Person 1: Oh shut up i dont need any of your grandma logic.
by GrandyScolfox June 20, 2010

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