Pie Face is an extremely fat bastard with massive tits, he stays inside and loves to eat lasagna, he has no real mates and has big enough tits to wear a bra other names for a Pie Face include garfield, fatty, man and fobe
When someone says with your pie face mouth that means when you talk so much and you get on someone nerves and you talk every 5 minutes you find something to talk about and walk around talking.