Top Definition
A phenomenon in which women who are repulsed by what childbirth and aging have done to their bodies begin serious weightlifting to regain their former physical beauty. Typically in their thirties, these women often attain levels of fitness, beauty and self-confidence far surpassing anything they enjoyed during their twenties. Revelling in their sleek, rock-hard bodies and being at the age of peak female sexuality, they are some of the most exuberant and overtly sensual women.
Jeff: Did you see the sculpted abs and smokin bubble butt on Ashley's mother?
LJ: Word. A truly outstanding muscle mom.
by Romeo Foxtrot January 31, 2007

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