Eats like a duck
When you eat so fast you might as well be swallowing your food whole, like it's your enemy and you're trying to defeat it.
My brother ate his breakfast like a duck. He didn’t even notice the egg yolk in his hair.
At the taco truck, my friend ate like a duck. He got a taco in his nose.
My neighbor’s kid ate like a duck and said, 'I'm not done yet.'