Breadcrumb Home > Dictionary > Index W whacky: Meaning and Definition of Find definitions for: whack•y Pronunciation: (hwak'ē, wak'ē), [key] — whack•i•er, whack•i•est. wacky. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: whacky (Thesaurus) whacko whale TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: anomie Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language