smart-ass
US /ˈsmɑːrt.æs/
UK /ˈsmɑːrt.æs/

1.
生意気な人, 利口ぶる人
a person who is irritating because they think they know everything and are quick to make clever, sarcastic remarks
:
•
Don't be such a smart-ass, just answer the question directly.
そんな生意気な口をきくな、質問に直接答えろ。
•
He always has a smart-ass comment for everything.
彼はいつも何にでも生意気なコメントをする。
1.
生意気な, 利口ぶる
behaving in an irritatingly superior and sarcastic way
:
•
His smart-ass remarks always get him into trouble.
彼の生意気な発言はいつも彼をトラブルに巻き込む。
•
I'm tired of your smart-ass attitude.
君の生意気な態度にはうんざりだ。