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slip
noun
°An act or instance of slipping.
°A women's undergarment worn under a skirt or dress.
verb
°To lose one's traction on a slippery surface; to slide due to a lack of friction.
°To err.
synonyms: blooper, blunder, boo-boo, defect more» , error, fault, faux pas, fluff, gaffe, lapse, mistake, stumble, thinko