/ Dictionary / Index W whopper: Meaning and Definition of Find definitions for: whop•per Pronunciation: (hwop'ur, wop'-), [key] — n. Informal. something uncommonly large of its kind. a big lie. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: whopper (Thesaurus) whop whopping Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language