Top Definition
A fat girl who posts pictures of other girls on message boards trying to coerce the posters to deal her compliments. Girls who willingly mutilate their fat bodies in front of webcams so someone will tell them they are worth something. Female equivalent of the neckbeard. Her thighs have started growing their own chins.
Did you see that chinthigh post the cutting pics on /b/?

Yeah, totally unfuckable.

My facebook is full of chinthighs complaining about their weight. "Just unfriend the fat bitches".
by r0ckarong January 08, 2012
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