A few things I can remember.
One was smoked haddock poached in milk. I tried it once and almost threw up, but because my dad liked it it would be cooked almost once a week...which reminded me that I wanted to throw up. That stuff stinks.
Another is Oranges. I can't stand the white fluffy bits if I peel them myself, but even worse is the smell if somebody else is eating an orange in the room, which was unfortunate because my brother liked them and there was always a big bowl full of them at Christmas. I later found out I was allergic to orange oil.
Marginal food items - I think Wands wins with the mealworms, but I regularly like blackpudding with a fry up. Not sure if you have it there but is basically just pigs blood and chopped fat soaked into oats then stuffed in intestines.
And the Haggis of course.