(n.) One who practices double dealing; a deceitful, trickish person.

Artful Dodger Benedict Arnold Brutus Casanova Don Juan Judas Judas Iscariot Machiavel Machiavelli Machiavellian Quisling actor archtraitor bamboozler befuddler beguiler betrayer charmer cockatrice conniver conspirator conspirer convict counterfeiter criminal crook deceiver deluder desperado desperate criminal dissembler dissimulator dodger double agent double-crosser duper enchanter entrancer faker felon fooler forger fugitive gallows bird gangster gaolbird gay deceiver hoaxer hypnotizer informer intrigant intriguer jailbird jilt jilter joker jokester kidder lawbreaker leg-puller machinator mesmerizer misleader mobster outlaw plagiarist plagiarizer playactor plotter practical joker public enemy quisling racketeer ragger rat role-player schemer scofflaw seducer serpent snake spoofer swindler tease teaser thief thug timeserver traitor treasonist trimmer turncoat two-timer