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3. law unto oneself

law unto oneself

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*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

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