@Jeruba mine is some wasabi peas and wasabi paste on sushi.
Also month old chicken and pop in my locker in high school. Yuck! Even worse I tried removing the taste from the chicken with a fountain drink and it was moldy. Yuck!
I guess I would have to say a piece of rattlesnake meat. We went to a rattlesnake round up one year, and they had little bites of snake meat they were handing out at one of the tables. Not bad, tasted like chicken. No, really. But my thought was, damn, I’m eating a frickin’ poisonous reptile!
@Love_my_doggie: Mayo is something I used to like on sandwiches but now I only like it in salads like potato or macaroni salad. On a sandwich, I think it’s gross now. I also hate the way it smells on my hands.