flouter

[Marionaduant]

someone who jeers or mocks or treats something with contempt or calls out in derision

[Renato]

one who flouts; a mocker

[Rihanna]

A person who flouts

[Michiko]

A flouter is a person who openly or contemptuously disregards laws, norms, conventions, or rules. This can apply to various contexts such as societal norms, school or workplace policies, or any established system of rules or principles.