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general::
Phrase(s): can’t find one’s butt with both hands (in broad daylight)
Sl. is stupid or incompetent. (Use caution with butt, which is often considered crude.) • Why did they put Jim in charge? He can’t find his butt with both hands! • Tom: Jane seems like a bright girl. Bill: You’ve got to be kidding! She couldn’t find her butt with both hands in broad daylight!
McGrawhill's American Idioms And Phrasal Verbs