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Meaning of big mama

big' ma'ma

Pronunciation: [key]
— Informal. (often caps.)Informal.
  1. a man's sweetheart, girlfriend, or wife.
  2. a woman regarded as the head of a family.
  3. the female founder or a leading female member of a company, organization, movement, etc.
  4. grandmother.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.