The opposite of "butterface", meaning a female who is extremely attractive from the neck up, yet it has an exceptionally unattractive figure or disfigurement not affecting the facial appearance.
Dude 1: "Hey, did you see that 'butterface' Aj took home last night?
Dude 2: "Yeah, but did you see her 'butterball' friend?
Dude 3: "Hell yeah. That's a huge bitch."