1chiefly North American A person who speaks and behaves as if they know more than others.
- Some wise guy had a tape measure with him and took a reading.
- Well, I have felt he's been a wise guy for some time and it certainly appears he's being that way now with his interlocutors.
- He continued to play numerous characters alternating between lead and supporting roles in various comedy flicks usually seen as a loveable slob, a bumbling schemer or an overbearing wise guy.
2US A member of the Mafia.
- Could be any inner-city gang member or wise guy.
- In my mind, I pictured him to be a little Italian wise guy, like the mafia hit man that's always the squealer on someone in those old movies.
- While other kids were flipping burgers, he was hiring himself out to local wise guys as muscle or masterminding his own bizarre capers.
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