gabionage
/ˌɡæb.ɪˈnɑːʒ/ or /ɡəˈbɪnjɑːʒ/Definitions
1. noun
Secretive or clandestine surveillance or espionage, especially involving gossip or rumors.
“The celebrity’s publicist accused the rival agency of gabionage, spreading false rumors about the star’s private life.”