For me it is hog maws, chitterlings and pig feet. In our household you had to eat what your parents cooked or you didn't eat. I haven't had any of those things since moving out of my parents home.
Liver, hominy, and lima beans. The liver and lima beans were not eaten again because they are hatefully horrible. My folk were mid westerners transplanted to California, where I was born, and I never saw hominy anywhere outside of my Mom's kitchen. I assume hominy was (is?) popular in the mid west...?