/ Dictionary / Index G goofball: Meaning and Definition of Find definitions for: goof•ball Pronunciation: (gf'bôl"), [key] — n. Slang. an extremely incompetent, eccentric, or silly person. a pill containing a barbiturate or a tranquilizing drug. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: goofball (Thesaurus) goof goof-off Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language