(sometimes initial capital letter) excessive adulation of one's mother and undue dependence on maternal care or protection, resulting in an absence or loss of maturity and independence.
a saying or remark that is characteristic of a mother talking to her child.
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British Dictionary definitions for momism
US informal the excessive domination of a child by his or her mother
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012