Informal. a cocksure, conceited, and often insolent person; smart aleck: He has a reputation for being a wise guy.
nice guyRead more in this article about some frequently asked questions and fun facts related to our definitions.
crook, hoodlum, know-it-all, mobster, bigmouth, criminal, hood, smarty-pants, mafioso, wiseacre, wiseass, wisenheimer
- wisdom of jesus, the son of sirach,
- wisdom of solomon,
- wisdom teeth,
- wisdom tooth,
- wise men,
- wise up,
- wise up to,
- wise, isaac mayer,
- wise, stephen samuel
Origin of wise guy
An Americanism dating back to 1895–1900
Also called wiseacre.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
informal a person who is given to making conceited, sardonic, or insolent comments
US a member of the Mafia
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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 American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.