adjective describing a person, particularly a female, who has a great body but the face is of questionable beauty. Not just a butterface, but a butterface with a hot body.
Cover the Face, fuck the base.
Dude 1: Hey, check out that fine ass!
fine ass turns around.
Dude 2: Where!? realizes the ugly face dude, shes got a nasty ass face.
Dude 1: ahh, but shes got a nice ass.
Dude 2: Ok, shes paperbaggable.