doesn't/wouldn't know (one's) ass from (one's) elbow
释义
doesn't/wouldn't know (one's) ass from (one's) elbow
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doesn't/wouldn't know (one's) ass from (one's) elbow
rude slang Is very stupid or dimwitted. I'm not surprised to hear that she got lost two blocks away from her house—she doesn't know her ass from her elbow.See also: ass, elbow, know