fussbudget
Pronunciation:
/ˈfʌsˌbʌdʒɪt//ˈfʌsˌbʌdʒɪt/noun
Definitions
One who complains or fusses a great deal, especially about unimportant matters; a fusspot.
Example: Their three-year-old daughter can be quite a fussbudget, but she's cute.