/ Dictionary / Index W whacking: Meaning and Definition of Find definitions for: whack•ing Pronunciation: (hwak'ing, wak'-), [key] — adj. Informal. large. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: whacking (Thesaurus) whacked-out whacko Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language