A girl who thinks they are little miss popular, even though they are ugly/bitchy/obese. They will reject any boy, even a friend, and by the time they guess the truth it will be too late.
Boy: Hey, Surla! We have been friends for a while now, and your pretty cool, so will you go out with me?
Self defeater: (While shoving big mac down her obese throat) Me? Go out with you? In your (MUNCH MUNCH) Dreams! C'mon girls, (talking to imaginary friend) Lets get away from doctor faggot here!