A term used by Russel Peters in one of his famous and awesomestcomedy acts. It is the face made while fucking (having sexual intercourse) not to be confused with cumface.
Bill:Hey fuckface!!!!
Taylor:I'm not fucking what are you talking about?
Bill:that's what your face looks like dipshit!!
Taylor: I don't dip my shit in anything but coffee
Bill:Fuck you Cumface!!
1) One who has caveman attributes; brow, jutted jaw
2) Characterized as one that lacks beauty
3) One's description after oral sexual activity
4) (see "shitstain" definition)