Rumormonger Share definition Flag Someone who tries to get you to lose the great respect you have for Kevin Costner by giving him a bunch of bad publicity. Nobody is succumbing to your bad press, rumormonger. Go fuck yourself. Rumormonger by Solid Mantis August 31, 2020 0 0 Get merch Get the Rumormonger mug. Buy Now — $32.95 See more merch