oath-tacking
When a person who took an oath acts like they're still honorable, but they're really just flipping it like a pancake to get out of trouble. It's like lying on a test but acting like you studied the whole time.
The mayor said he'd fix traffic, but now he's stuck in a traffic jam caused by his own dumb decisions.
The senator took an oath to serve the people, then took a bribe and forgot about them.
The governor swore he'd save the city, then spent all the money on a new pool.