a person who does things differently and ignores the usual rules.
The male characters in her novels are usually attractive, powerful, and dangerous – a law unto themselves.
a law unto (oneself)
One who does whatever they desire and/or ignore 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!
law unto
A phrase used to describe someone who acts independently of what is normal or expected. Julie has always marched to the beat of her own drum. She's a law unto herself.
a law unto (oneself)
A totally independent operator: An executive who is a law unto herself.