fatback

/ˈfætˌbæk/
noun
  1. A cut of pork from the back of the pig, consisting mostly of fat, often used for cooking or flavoring dishes.
    • Fatback is often salted and cured before being sold.
    • She used fatback to add flavor to the collard greens.
    • The recipe calls for a small piece of fatback to render the fat.