/ Dictionary / Index S slaphappy: Meaning and Definition of Find definitions for: slap•hap•py Pronunciation: (slap'hap"ē), [key] — -pi•er, -pi•est. severely befuddled; punch-drunk: a slaphappy boxer. agreeably giddy or foolish: After a martini he was slaphappy. cheerfully irresponsible: a slaphappy crowd. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: slaphappy (Thesaurus) slap dashing slapjack Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language