1 definition by valentine D.

A woman who is the mother of another man's baby, who she typically isn't married to.
OR bearing a child for another woman who can't concieve.
man: you waitin for yo baby mama?

barren woman: she's not my baby mama

man: you pay the bills, She has the baby.

that's called a baby mama--you ask any black man in philadelphia.
by valentine D. June 21, 2009
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