/ Dictionary / Index B big mama: Meaning and Definition of Find definitions for: big' ma'ma Pronunciation: [key] — Informal. (often caps.)Informal. a man's sweetheart, girlfriend, or wife. a woman regarded as the head of a family. the female founder or a leading female member of a company, organization, movement, etc. grandmother. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. big lie bigmouth Related Content Daily Word Quiz: ravenous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language