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. Kim may be tiny, but she has a big appetite, so don't be surprised when she fills her face just like your teen boys!
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