Buttergrille
Used in the case you see a girl with a supermodel face, but when she smiles, you swear she's got a tub of margarine's worth of yellow goo on her teeth.
Damn she was beautiful... buttergrille (but her grille) was nasty...
buttergrill
A variation of the adjective 'butterface,' used to define an extreme dental hygeine deficiency
That chick was a total buttergrill! After she smiled and i got a migrain!