A fucking dope ass dude. This dude can't be held down by anything. Hella Fatt is the type of person that intimidates on first impression but is generally a cool ass dude and easy as fuck to get along with.
A person so morbidly obese that they literally can not moveunless transported by machinery.
In the movie 'What's Eating Gilbert Grape', the kids are ashamed of their mother because she is so obese. So obese, in fact, that she is a crane fatty.