fussbudget

/ˈfʌsˌbʌdʒɪt/
noun
  1. A person who is often worried or annoyed about small, unimportant things and complains a lot.
    • The office fussbudget always emails everyone about the temperature being too cold.
    • My grandmother is a real fussbudget about the way the dishes are stacked.
    • Don't be such a fussbudget; a little dust won't hurt anyone.