wise guy
US /ˈwaɪz ˌɡaɪ/
UK /ˈwaɪz ˌɡaɪ/
1.
saputello, saccente, spiritoso
a person who is irritating because they think they know everything and try to be clever
:
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Don't be such a wise guy, just answer the question.
Non fare il saputello, rispondi e basta alla domanda.
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He always has a sarcastic comment, a real wise guy.
Ha sempre un commento sarcastico, un vero saputello.