@spauldo That's horrifying. To paraphrase the line about haggis in
So I Married an Axe Murderer, "In fact, I think most
Scottish Inuit cuisine is based on a dare."
I think I found a phrase, though not a single word, that describes this phenomenon: acquired taste delicacy. That's also the politest way someone can describe such foods. Some of these are not only repellent, but can be actively dangerous to eat, like fugu or casu martzu. There is a single word in Japanese, chinmi (which translates to 'rare taste' or 'delicacy') but I don't know the language well enough to know if that's the best term for this context, though.