mudslinger
n 1: one who spreads real or alleged scandal about another
(usually for political advantage) [syn: {muckraker},
{mudslinger}]
22 Moby Thesaurus words for "mudslinger": Thersites, backbiter, belittler, calumniator, caustic critic, cynic, debunker, decrier, defamer, deflater, depreciator, derogator, detractor, disparager, hatchet man, knocker, libeler, muckraker, railer, slanderer, social critic, traducer