Английский словарь американских идиом - law unto oneself

{n. phr.}, {literary} A person who does only what he wishes; a person who ignores or breaks the law when he doesn't like it. * /Everybody in Germany feared Hitler because he was a law unto himself./ * /Mr. Brown told Johnny that he must stop trying to be a law unto himself./ Compare: TAKE THE LAW INTO ONE'S OWN HANDS.