/ Dictionary / Index W wise guy: Meaning and Definition of Find definitions for: wise' guy" Pronunciation: [key] a cocksure, conceited, and often insolent person; smart aleck:Also called He has a reputation for being a wise guy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. wisecrack Wiseman Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language