wise guy

US /ˈwaɪz ˌɡaɪ/
UK /ˈwaɪz ˌɡaɪ/
"wise guy" picture
1.

умник, всезнайка, острослов

a person who is irritating because they think they know everything and try to be clever

:
Don't be such a wise guy, just answer the question.
Не будь таким умником, просто ответь на вопрос.
He always has a sarcastic comment, a real wise guy.
У него всегда саркастический комментарий, настоящий умник.