gossipmonger
/ˈɡɑsəpˌmʌŋɡər/
noun
- A person who spreads gossip, especially in a malicious or persistent way.
- The town gossipmonger spread a false rumor that caused a lot of hurt.
- Be careful what you say around her — she's a real gossipmonger.
- The gossipmonger at the office loves to stir up drama.