Alright, so a poo poo face is commonly known as a person whos being special/retarded/ or just plain messed up. Commonly known as a stupid comeback to your close friends.
Poo Poo faces are ranked. there is the MEGA poopoo face, and the original semi poopooface. Mega poopoo face is the president of poopoo faces and the semi poopoo face is the vice president.
DO NOT USE ON PEOPLE YOU DONT KNOW. they will either laugh at you or beat you up.
Marcin: Hey Marta! Guess what!
Marta: i donno what could it be this time?
Marcin; YOUR A POOPOO FACE! AHAHAHHAHAHAHHA
Marta: oh really? well your the MEGA poo poo face! OWNAGE!
Marcin: ( sigh ) oh nooo, ive been defeted...