[1] : The Collaborative International Dictionary of English v.0.48

mama's boy \mama's boy\ n.
   same as mamma's boy.
   wordnet 1.5
see also:
mamma's boy 

[2] : The Collaborative International Dictionary of English v.0.48

mama's boy \mama's boy\ n.
   a boy excessively attached to his mother; a boy lacking the
   usual masculine interests; also spelled mamma's boy.

   syn: mother's boy.
        wordnet 1.5
see also:
mamma's boy 

[3] : WordNet (r) 2.0

mama's boy
     n : a boy excessively attached to his mother; lacking normal
         masculine interests syn: mother's boy, mamma's boy
see also:
mother's boy mamma's boy 

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