half-wit

1. You half-wit! I asked you to get me some parsnips, not turnips.
   你这个傻瓜！我要你给我买一些欧洲萝卜，而不是芜菁。
2. She's talking about going back to that half-wit marriage counselor again.
   她说又要去找那个白痴婚姻顾问。
3. Ivan's a bit of a half-wit, isn't he?
   伊凡有点笨，不是么？

noun

1. a stupid incompetent person

   Synonym:    dimwitnitwitdoofus

2. a person of subnormal intelligence

   Synonym:    idiotimbecilecretinmoronchangelingretard