wise guy

1. N-COUNT If you say that someone is a wise guy, you dislike the fact that they think they are very clever and always have an answer for everything. 自作聰明的人; 自以爲(wèi)無所不知的人[非正式]

2. N-COUNT A wise guy is a member of the Mafia. 黑手黨成員[美國英語] [非正式]