a law unto (oneself)
Someone 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! The country will be met with swift sanctions if their president continues to act as a law unto himself.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.
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.
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012