Stuff the face - When you eat a lot of food, then we say that you have stuffed your face. Well, stuffing actually means filling something in some dish, for example, we stuff mashed potato between two breads. So from this word, we have derived the meaning of this idiom.
1. Why do you eat so much, is not good for health? You just stuff your face.
2. I want to stuff my face now, these dishes are so delicious.
3. Aamir stuffed his face in the party, as the food was for free, even I did.