1 definition by Chark Charkles

Top Definition
A girl who focuses on losing weight to the exclusion of actually being healthy or attractive. A Bonesack is frequently anorexic or bulimic and prefers starvation to exercise and a healthy diet.
"Did you see that Bonesack? I could see every one of her ribs."
by Chark Charkles July 10, 2008

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