Definitions from Wiktionary (wise guy)

▸ noun:  (informal, mildly derogatory, sarcastic or humorous) One who is insolent or flippant; one who makes jokes or perpetrates pranks.
▸ noun:  (slang) A knowledgeable or successful sports bettor.
▸ noun:  (US, slang) A member of the Mafia; a mobster.
▸ noun:  (slang) A hipster.
▸ noun:  (slang, offensive, ethnic slur) An Italian-American man.
▸ Also see wise_guy

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