| a boy or man showing excessive attachment to or dependence on his mother. |
| ma·ma's boy (mä'məz) n. A boy or man characterized by unusual closeness to his mother and often by timidity and overly refined manners. |
mama's boy
A sissy, especially a boy or man excessively attached to his mother. For example, The children called Tom a mama's boy because he ran home with every little problem. This sexist expression has survived despite its pejorative tone. [Colloquial; mid-1800s]