/ Dictionary / Index S stumblebum: Meaning and Definition of Find definitions for: stum•ble•bum Pronunciation: (stum'bul-bum"), [key] — n. Informal. a clumsy, second-rate prizefighter. a clumsy, incompetent person. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: stumblebum (Thesaurus) stumble stumbling block 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