feed (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 feed my face real quick before I head out. Sorry, I'm not hungry for dinner—I really fed my face at the luncheon earlier.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
feed one's face
Inf. to put food in one's mouth; to eat (something). You're always feeding your face. You're going to get fat. Stop feeding your face and listen to me.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.