its called knocked knees, a large portion of even the non-obese population shows a lesser form of this when their knees turn in while squatting. if you could see the buttocks underneath those lard-glands, you would likely see very poorly developed gluteus maximus, over developed medial glutes (creating the cone shaped hips you often see on this creatures) and the feet are almost certainly completely flat. One good fall and this thing could be crippled.