Feed your face
Definition 1 of 1
Pro Tip 1/3Casual Speech
Used in informal settings among friends or in relaxed environments, not in professional or formal situations. 
At the picnic, everyone was happy to just feed their face.
Pro Tip 2/3Slight Mockery
Can imply a light teasing or criticism of someone eating a lot, but usually isn't harsh. 
Look at Jim feed his face — he must be starving!
Pro Tip 3/3Exaggeration
Often used to exaggerate or emphasize the action of eating, not always literally eating 'a lot'. 
After fasting, I can't wait to feed my face with my mom's cooking.