fill (one's) face
slang To eat a lot of food, especially quickly and in a short period of time. I have to leave for my four-hour meeting in 15 minutes, and I don't want to be hungry later, so I need to fill my face real quick before I head out. Sorry, I'm not hungry for dinner—I really filled my face at the luncheon earlier.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
fill one's faceand stuff one's face
Sl. to eat food fast; to stuff food into one's face. Everytime I see you, you are stuffing your face. No wonder you're overweight!
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.