oral sex involving pushing the giver's head into the receiver's pelvis so hard as to injure the face of the giver.
I monster-faced your mother so bad last night, she lost most of her teeth.
by Norristonian April 18, 2004
anyone who's facial features take up a disproportionately large amount of their skull.
dude, your girlfriend has total monster-face. she looks like the singer from bane.
by ryan ingersol March 07, 2005