/ Dictionary / Index C crumbum: Meaning and Definition of Find definitions for: crum•bum Pronunciation: (krum'bum"), [key] — n. Slang. crumb (def. 5). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. crumbly crumby Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language