I've eaten squirrel, turtle and a lot of odd foods I guess.
Actually, I don't think beef tongue is bad, although not a favorite for sure. I cooked it once because it was all the meat we had left at the time. Once I got over the intial (ewwww gross) thoughts in my head, I realized it wasn't as bad as my mind had told me it would be.
Absolutely detest beef liver, makes good fish bait is the best I can say for it.
Also, I'd just as soon eat grass as turnnip greens. Just nasty!
Mountain oysters, and oysters in general are both on my taboo list. Don't care for seafood much either with the exception of flounder and shrimp.