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1. an ass that is fat
2. One who is fat in general
3. An insult shouted among annorexic girls when one of them breaks the 80 pound mark.
"Cartman, you fatass"
"EWWW!! You are, like, over, like, 81 pounds, you fatass!"

by Fatass July 20, 2003
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26
A person who eats sooo f much and all he does is talk about food
by FuckerπŸ˜‚ June 08, 2017
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