無毛 wúmáo hairless Origin Definitions Defs Strokes Stroke Words Sentences Sents 嘴上无毛，办事不牢 zuǐshàngwúmáobànshìbùláo young and unreliable Literally meaning "no hair on the lip, no reliability in work"; a proverb suggesting that a young person lacks the experience to be trusted with important tasks.