rumourmonger
From Longman Dictionary of Contemporary Englishrumourmongerru‧mour‧mon‧ger British English, rumormonger American English /ˈruːməˌmʌŋɡə $ -mərˌmɑːŋɡər, -ˌmʌŋ-/ noun [countable] RUMOUR/RUMORsomeone who tells other people rumours – used to show disapproval