butterball

A round lump of a coagulated fat used in cooking such as butter or margarine.

An overweight person.

What if your baby is a butterball? Does Fat-Proofing mean you should put your infant on diet?.

A small North American duck, the bufflehead, Bucephala albeola.

The skipper had his eye on a bunch of butterballs feeding not far from the boat. In fact there were ducks all around — though he did not tell me so.

A turkey.