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.

oh christ! i ate so much during the holidays, i truly ravened-out.
by Jo-breezy January 11, 2009
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