The act of employing all possible means to ensure you are the first one to reach food items. Fat rushers tend to ignore all other surroundings and events until they reach their prize.
For the drink version, see lush rush
As soon as the potatoes were ready Julie fat rushed to the kitchen, knocking Matthew over in the process and stealing his plate.
There was a crowd of children fat rushing the ice cream truck.
My co-workers all fat rush me every time I bring these cookies to the office.