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1.
African American definition of a Grandmother, matriarc of the family or any female older than your own helping to raise you
Grand Mother or any female older than your own helping to raise you
by Lawrence Cannady March 05, 2005
 
2.
The most amazing, helpful person that could ever exist. She loves those whom love her. She will always have you back as long as long as you don't talk shit about her or people she loves. She is a mamma bear if you hurt one of her babies.
Heller Big Mamma
by Rodriguez_miker98 June 16, 2011
 
3.
a fat woman
hey big mamma , you are some sort of fat
by George Courtney February 23, 2004