backstabber

Brutus Judas betrayer defector deserter double agent double-crosser fink informer quisling snake in the grass snitch spy stool pigeon treasonist turncoat

deceiver double-crosser fink narc nark rat snitch spy traitor turncoat weasel

Benedict Arnold stool pigeon

accomplice collaborator plotter traitor

betrayer highbinder subversive

caballer colluder

betrayer conspirator deceiver rat turncoat two-timer weasel

Benedict Arnold

betrayer blabbermouth canary double-crosser fink informant sneak snitch source squealer stoolie tattler tattletale turncoat whistle-blower

deep throat stool pigeon

Pandora's box creep pitfall rat rat fink skunk snake sneak trap villain viper weasel