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A mommy in a thong. Typically in her late teens or early twenties, unmarried and still hot. Thong mommies dress the same way they did before pregnancy, e.g., tight baby doll tee, navel piercing, back tattoo and low rider pants with a thong showing.

"Thong mommy" is a new millenium take on the "welfare mother"; thong mommies are usually clueless about the harsh realities of life. To thong mommies, life is a party and a baby is a cool accessory.
The mall is a great place to find a hot young thong mommy.
by Spanky Smackety May 05, 2007
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