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1. When a woman's child is not her husband's/boyfriend's.

2. A child that is conceived in an affair.
3. When a woman doesn't know who her baby daddy is.
"Hey man! Did you see Lisa's baby?"
"Yeah. That's totally not her husband's!"
"Should we tell him we think it's a Maury baby?"
by Ilovecats September 13, 2014
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