FFK Syndrome or Former [Fat Kid] Syndrome 

A person who, in the past was fat and/or utterly unattractive, but now is considered attractive by society, yet still retains the mental, and emotional status of a fat kid and therefore does not understand social cues.

"Jane may be hot now, but she still suffers from FFK Syndrome or Former Fat Kid Syndrome"

FFK Syndrome or Former [Fat Kid] Syndrome by 1122 February 5, 2009