/ Dictionary / Index S smart ass: Meaning and Definition of Find definitions for: smart' ass" Pronunciation: [key] — Slang (sometimes vulgar) Slang (sometimes vulgar). a wise guy; know-it-all. smart-ass Pronunciation: (smärt'as"), [key] — Slang (sometimes vulgar) Slang (sometimes vulgar). —adj. characteristic of a smart ass or wise guy. —n. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. smart aleck smart bomb Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language