IBF

Inverted Butter Face Whereas a "Butter Face" will have a rockin body but a less than acceptable face (averaging her rating down 2 points on a scale 1-10 where 4 is fuckable), an Inverted Butter Face will have an amazing face, but a body that truly is terrible. IBFs are more often than not found on the internet taking advantage of photo cropping to conceal their deal-breaking flaws in several pictures. Note that their profile pictures will all be of their faces and other photographs will seldom include the rest of their bodies. Make sure you don't start flirting with one of these women, god forbid you'd ever have to touch one in real life.