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When a female arches her lower back. Usually done in a standing position, bending her knees slightly, sticking her butt out, and forming her lower back into an arch for an erotic pose to get a males attention. (i.e a cat arching its back)
Damn Jillian can really arch her back!!

The cat arched its back.

Arched Back is the hottest pose a girl can do.

by Sugadaddy897 March 18, 2009
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