wise guy

noun5

1. •
   (informal, humorous) One who is insolent or flippant; one who makes jokes or perpetrates pranks.

   • Her reputation for being a wise guy made her new teachers hesitant about having her in their classes.
2. •
   (US, slang) A member of the Mafia; a mobster.
3. •
   (slang) A knowledgeable or successful sports bettor.
4. •
   (slang, offensive) An Italian-American man.
5. •
   (slang) A hipster.