eat me out of house and home
Used when someone eats so much it feels like they live in the kitchen and you're just paying the rent.
My sister eats me out of house and home. She lives in the kitchen and I pay the bill.
My dad eats me out of house and home every time he visits. He eats like he's never going to die.
My friend eats me out of house and home. I think he eats more than I do in a whole week.