A Büf (BOO-ph) is a black silk, velvet, fleece hat woven in a form similar to that of a beanie (but worn in a way that covers the wearer's ears, forehead, and neck) with iron studs woven across the surface. A Büf (Bæf, for plural) is traditionally worn by followers of the Korrui religion during the span of time from Krampus to Luna Flame.

when you're hungover as shit after a spending a night drunk as a skunk

A black or dark grey hat sewn in a form similar to that of a beanie that is lined with smooth-sanded, circular silver or iron studs. A Büf is worn in a way that covers one's upper neck, ears, and forehead along with one's hair by followers of the Korrui religion during The Focused Time

A "Big Useless Fuck." Usually a huge guy on roids that never really helps anyone do anything simply because he's too busy looking in a mirror.

Stands for Babe Under Fat. It is when a fat girl has the capability to be good-looking if she lost the weight.

When you are an introvert and have no social skills, and then someone asks you something but have no answer.

Means "Big Ugly Fella" in its politest form.