- (especially North American English, informal, disapproving)
a person who speaks or behaves as if they know more than other people 自以为无所不知的人；万事通 OK, wise guy, what do we do now? 好了，万事通，我们现在该怎么做呢？
- (US English, slang)
a member of the Mafia 黑手党成员