From Longman Dictionary of Contemporary Englishmammamam‧ma /ˈmɑːmə/ noun [countable] American English SSFMOTHERanother spelling of mama1
Examples from the Corpus
mamma• He is kept under a wholesome course of discipline by Lavinia and her august mamma.• What would become of mamma without Marie?• Don't, Robert, you will quite pull poor mamma over. 