I just can't stand apples, even though I love apple juice. Corned beef is pretty nasty too.
Also, I know this might sound weird, but while I love all sorts of cheese, I hate anything that's 'cheesy'. What I mean by that is anything that has a fake, artificial cheesy taste. Stuff like macaroni and cheese or anything else involving cheese sauce, cheesy crisps (though to be honest I've never liked crisps full stop), processed American cheese (unless it's on a burger), those Mini Cheddar things, and suchlike.