1. Loud chewers
  2. Bananas
  3. Someone blowing their nose
  4. Clinking of utensils on a plate
  5. Fireworks
  6. Nail clippers
  7. My cat coughing up a hairball
  8. That ringing noise when you're on an airplane and you can't pop your ears
  9. Skin being scratched
  10. Crinkling water bottles
    Suggested by @kate81
  11. Prolonged eye rubbing
    Suggested by @jennyanydots
  12. The sound ones mouth makes as they swallow and/or sound good to their esophagus. One of which involves chewing but also includes all the slurpy/squishy/nasty noises that follow.
    Suggested by @Charlie_Chester
  13. Styrofoam
    Suggested by @MatthewAlmont