a law unto (oneself)

a law unto (oneself)

One who does whatever they desire, ignoring the rules and regulations. If you need to delegate, I wouldn't ask Gina—she is a law unto herself, and it's hard to persuade her to do anything she's not interested in. How many times has Jason been arrested now? Geez, he sure is a law unto himself!
See also: law, unto
Farlex Dictionary of Idioms.

*law unto oneself

Fig. one who ignores laws or rules; one who sets one's own standards of behavior. (*Typically: be ~; become ~.) You can't get Bill to follow the rules. He's a law unto himself. Jane is a law unto herself. She's totally unwilling to cooperate.
See also: law, unto
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

law unto oneself

A person who is totally independent, especially one who ignores established rules. For example, You can't tell Marge how to punctuate; she's a law unto herself. [Second half of 1800s]
See also: law, unto
The American Heritage® Dictionary of Idioms by Christine Ammer.

a law unto yourself

COMMON If you describe a person or organization as a law unto themselves, you mean that they do what they want, ignoring laws, rules, or usual ways of doing things. He does his work well but in an unconventional way. He is truly a law unto himself. Most athletic departments are pretty much a law unto themselves — unaccountable in terms of where this money goes.
See also: law, unto
Collins COBUILD Idioms Dictionary, 3rd ed.

a law unto himˈself, herˈself, etc.

a person who does what they want, even when this is against the rules and customs of a group or society in general: That man is a law unto himself. He comes to work when he likes, and when he’s here he doesn’t do what he’s supposed to do.
See also: law, unto
Farlex Partner Idioms Dictionary

a law unto (oneself)

A totally independent operator: An executive who is a law unto herself.
See also: law, unto
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • a law unto
  • a law unto himself, herself, etc.
  • a law unto yourself
  • law unto oneself
  • unto
  • be a law unto (oneself)
  • be a law unto yourself
  • law
  • himself
  • herself