snake in the grass Synonyms

snake deceitful person double-crosser stool pigeon bad egg fink weasel viper villain turncoat traitor traditor two-timer nark corrupt person rat fink fifth columnist double agent defector quisling backstabber rotter narc stoolie snitch telltale squealer fizgig double dealer deserter creep colluder collaborator cheat canary blackguard blabber grass informer intelligencer snout sneak skunk scab renegado renegade rat pig peacher judas