Top Definition
A mother who is convinced that her child is a genius. Mensa Mommy has given birth to Jesus H. Christ, or at least the next best thing. Her child will walk before yours, talk before yours, sleep through the night before yours, breastfeed better, and generally stomp the crap out of your child before the age of 2 and for the rest of your lives. No matter what cute, adorable, or truly remarkable thing your child does, she has a story to one up you.
The Mensa Mommy outrageously insisted that her 4 month old was clearly articulating the words to "Twinkle Twinkle Little Star."
by Lawyer Mama March 01, 2008

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