wise guy

A smart aleck.

noun

One who is obnoxiously self-assertive and arrogant: malapert, witling. Informal know-it-all, saucebox, smart aleck, smarty, smarty-pants, wisenheimer. Slang wiseacre, wisecracker. See good/bad.

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.

The noun has one meaning:

Meaning #1: an upstart who makes conceited, sardonic, insolent comments
  Synonyms: smart aleck, wiseacre, wisenheimer, weisenheimer

Wise Guys may refer to

• Wise Guys - a Brian de Palma film from 1986
• Wise Guys - a German a cappella group
• The Wiseguys - a British electronica hip hop band
• Wise Guys - a Stephen Sondheim musical later renamed Bounce

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