to be hold a reasonable weight and in a short period of time balloon to an unreasonable weight. It's origins are from the Television actress and disney tool Raven Simone. Whom at one point of her show "that's so raven" was fairly skinny and in a course of one season became overweight.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.