(n.) One who transgresses; one who breaks a law, or violates a command; one who violates any known rule or principle of rectitude; a sinner.

bad person criminal crook culprit deceiver delinquent evil man evil person evildoer felon gangster lawbreaker malefactor malevolent malfeasant malfeasor miscreant misdemeanant misdemeanist misfeasor mobster offender outlaw public enemy racketeer sinner thief trespasser villain worker of ill wrongdoer