What is pork fatback?

Fatback is a cut of meat from the back of a hog, typically consisting of a thick layer of fat with a thin layer of meat on one side. It is a popular ingredient in many cuisines, particularly in the southern United States, where it is often used in dishes such as collard greens, black-eyed peas, and hoppin' John. It can also be used as a cooking fat, and is sometimes rendered into lard. Fatback is a relatively inexpensive cut of meat, and is often used as a way to add flavor and richness to dishes.