| Informal. a cocksure, conceited, and often insolent person; smart aleck: He has a reputation for being a wise guy. |
| wise guy n. Slang A smart aleck. |
wise guy
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wise guy
An obnoxious know-it-all, a person who makes sarcastic or annoying remarks, as in the teacher was delighted that the worst wise guy in the class was moving out of town. [Slang; second half of 1800s] Also see smart aleck.