A female with a hot body but an unattractive face. Pronounced like "butter face," but actually derived from the phrase "but her face": "She's got a smoking body, but her face is so ugly it's scary."
I would definitely bang her, but she's a real butter face.
Yeah unfortunately she's a butter face but she's got a great personality and is a lot of fun in the sack as long as you don't look above her neck.