For the lunchroom at work, with lots of other people watching you eat while they attempt to enjoy their lunch:
A sort of antipasto salad I purchased at a local deli.... pasta, little pieces of cheese, etc, and little baby octopuses (octopi).. "Look! You can see the suckers on his tentacles" I said as I stuffed a whole one into my mouth.... I don't think I could have possible done anything worse to gross out my coworkers!