Breadcrumb Home > Dictionary > Index B big bucks: Meaning and Definition of Find definitions for: big' bucks' Pronunciation: [key] — Slang. Slang. a large amount of money. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. big brown bat big business ✖ Related Content Daily Word Quiz: acronym Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language