/ Dictionary / Index W willywacks: Meaning and Definition of Find definitions for: wil•ly•wacks Pronunciation: (wil'ē-waks"), [key] — n. willowwacks. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. willy-nilly willy wagtail Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language