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.
a piece of cardboard from a pack of cigarettesrolled up and stuffed into the bigger end of a blunt. Stops particles from flying into your mouth, AND gives optimal smoke flow.
1.) You want me to put a mouth piece in this shit?
2.) Take that fuckin mouth piece out dude! The weed almost gone!