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Phrase(s): ain’t got the brains God gave a squirrel [and] ain’t got the sense God gave geese
Rur. is or are very foolish. • There goes John, running around barefooted in the snow. He ain’t got the brains God gave a squirrel. • No use trying to explain anything to Jane. She ain’t got the sense God gave geese.
McGrawhill's American Idioms And Phrasal Verbs