木头木脑 mùtóumùnǎo dull-witted Origin Definitions Defs Strokes Stroke Words Sentences Sents 木头 木頭 mùtou blockhead a slow-witted or dull person; a blockhead木 mù slow-witted slow-witted; stupid; dull; unresponsive脑 腦 nǎo nounlocative head (bound form) The head; often used in phrases describing head movements or appearances.