/ Dictionary / Index S smackeroo: Meaning and Definition of Find definitions for: smack•er•oo Pronunciation: (smak"u-r'), [key] — pl. -er•oos. a hard slap or swat: He gave the ball a smackeroo. smacker. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. smacker smacking Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language