The cheek of a hog, which is usually cut into squares before being cured and smoked. Hog jowl is generally only available in the South. Tightly wrapped, it can be refrigerated for up to a week. It's fattier than bacon but can be cut into strips and fried in the same manner. It's also used to flavor stews, bean dishes and the like.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.