a short bar with a weight at each end, used for making the arm and shoulder muscles stronger 哑铃 
- (North American English, informal)
a stupid person 笨蛋；蠢货；傻瓜
Word Originearly 18th cent.: originally denoting an apparatus similar to that used to ring a church bell (but without the bell, so noiseless or “dumb”); sense (2) (dating from the 1920s) is an extended use by association with dumb ‘stupid’.