the post-meal food drool in the corner of a person's mouth that they tastelessly leave for other's to gaze upon.
after we ate a the pizza parlor, Harry had facegravy all over his mouth and no one said anything, and we all enjoyed it.
by manfun December 04, 2011
The act of pounding and/or bashing a person's face into a wall or the pavement until their face turns to a gravy-like substance
"Lets make FACE GRAVY!" -- Goliath, Borderlands 2
by James moore May 11, 2013