What is another word for open defiance of authority?

Here are some synonyms for "open defiance of authority," with varying degrees of intensity:

Formal:

* Insubordination

* Disobedience

* Rebellion

* Sedition (implies inciting rebellion)

* Treason (implies betrayal of one's country)

Informal:

* Noncompliance

* Resistance

* Opposition

* Recalcitrance (stubborn refusal to obey)

* Defiance

* Infraction

* Confrontation

Figurative:

* Throwing down the gauntlet

* Taking a stand

* Bending the rules

* Pushing the envelope

The best word to use depends on the specific context and the level of formality you want to convey.