A morbidly obese girl who dressed in very inappropriately sexy clothing. She will usually display absolutely no awareness of her body or how provocatively she is dressed. However, she may also be super-aware of her sexuality, expecting all men to desire her and showing absolutely no interest in or recognition of rejection by the opposite sex. The term "cake" refers to her constant desire and inappropriately timed consumption of sugarey baked goods and hydrogenated snacks. IE, eating twinkies while wearing a vinyl mini skirt at a night club.
"check out that cake on the dance floor - I've never seen anyone eat a twinky and back their ass up at the same time!"