obese beast
A giant, meaty monster that eats so much it looks like it swallowed a buffet. They can’t walk, just roll around like a fat tire.
My uncle is an obese beast. He eats three pies for breakfast and still complains about the food.
My dog looks like an obese beast after eating my entire pizza.
The obese beast in the gym can’t even do a sit-up without screaming.