A woman who is not quite thin, and not quite fat. In the clubs, she goes out wearing Spanx, an undergarment (girdle) designed to conceal cellulite and bumps, but when her date takes her home, the undergarment is removed, revealing mountains of shocking fleshy cellulite and fat.
A: Wow! Regina looks so good! Did she lose weight?
B: No, she's got it all tucked in-- she a spanx whore.