I really could go on forever, but for now I will add:
People cooking in long sleeves
The word 'loose' when applied to bowel movements
The phrase 'bowel movements'
Children eating in pushchairs (and yes, middle-class Mumsnetters, that includes your child with their Tupperware pot of organic lentil crackers; it doesn't just mean a child eating something from a Greggs bag)
Dirty clothing, towels etc being described as 'soiled'
The BBC Radio 4 programme 'You & Yours'
People calling sex 'making love' or even worse, 'lovemaking'
Knitted postbox toppers
Any food items that are crinkle-cut
A packet of mints in a car
A packet of mints in a handbag
Just packets of mints generally, really
Giant foam hands at sporting events / concerts
Curly wigs in team colours worn by football supporters
Vitamins in chewy form being described as 'gummies'
Football commentators describing a pass as 'sloppy'
Yorkshire puddings that are described as 'Yorkies'. Strangely, this ick only applies to Yorkshire puddings, not Yorkshire terriers
Evening wear or dance costumes that have that nude coloured illusion mesh that's meant to be invisible but isn't
Mugs with sloping sides
Wire coat-hangers
Seeing people drink from a water bottle or other such drinking vessel that has a built-in straw
A single helium balloon that has gone rogue and is floating off very high in the sky
Being very close to a large industrial structure you have only ever previously seen from a great distance
Jelly Babies