butterface

Etymology

Ellipsis of various forms of everything looks good but her face, great body but her face, etc., under the influence of butter (perhaps also with connotation of "plainness", grease, etc.) & buttface, which see. Compare summerteeth.

noun

1. (slang, derogatory) A person who has an attractive body but less attractive face.
   I can't even look at her, she's such a butterface.
   Her face wasn't quite as pretty as he had hoped — Earl, the other mechanic back at his father's place called this kind of girl a Butterface... 2010, Laura Lippman, I'd Know You Anywhere, New York: HarperCollins, page 76
2. The face of an unattractive person.
   I can't even look at her, she's got such a butterface.
   Her friend had a hot figure and a butterface — great body, but her face — and they were talking about Greyhound's most recent dating fiasco. 2004, Amy Sohn, “The need to know and the fear of knowing”, in My Old Man, New York: Simon & Schuster, page 106