Most Disgusting food you've ever tasted?

Poured a bit of my housemate's soy milk into my cereal. Thought he wouldn't notice. Put cereal in my mouth and promptly vomited. Turns out it had been in the fridge around four months. The taste was pure evil.

It was a burger from Mcdonalds that shit was embarassing for such a big company

My aunt forced me to eat olives and i told her i'd throw up.. She didn't listen so i ate it and then guess what, I THREW UP

Anything related to fish, really hate all sea food.