nosey parker
/ˈnoʊzi ˌpɑrkər/
noun
- A person who tries to find out information about other people's private lives or activities.
- Our neighbor is such a nosey-parker; she always watches us through her curtains.
- The old man was known as the village nosey-parker because he knew everyone's business.
- Don't be a nosey-parker and read my diary.