A playful way to joke around with ones close friends who are eating most of your food. Not really meaning to say that they are overweight, but you just say that to make them sotp eating there food. Also used if you want people to give you there food.
Hey casey stop being fat and eating my food.
Hey person I don't know. You seem really fat, do you think you should be eating that fat covered, dipped in fat, smothered in animal fat, 50 grams of each Saturated, Mono unsaturated, Poly unsaturated fat, dripping with pure fat apple?