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1.
When a person get mad over food.

Kinda like nerd rage but with fat people and food.
Fat person: "You ate my cookies?!?!"
Normal person: "Dude, don't fat rage."
by Fiction. October 15, 2010
 
2.
Wanting to run over skinny people with your shopping cart at the grocery store.
That skinny tramp cut in front of me. I'm gonna channel all my fat rage and run the biotch over!
by tbone461 May 07, 2012