The spellings smartarse in British English and smartass or smart-ass in American English are also used.英国英语里也拼作smartarse，美国英语里也拼作 smartass 或 smart-ass。
N-COUNT [oft NOUN n]自作聪明的人;自以为是的人;神气活现的家伙 If you describe someone as a smart arse, you dislike the fact that they think they are very clever and like to show everyone this. 自作聪明的人;自以为是的人;神气活现的家伙 [informal, rude, disapproval]