oath-tacking
Oath-tacking is when someone takes an oath, but then they break it like it’s glass and act like they never had it in the first place.
The mayor said he'd fix the roads, then made them worse by adding a new lane for his own car.
The senator swore he'd be fair, then took all the money for himself.
The governor promised to keep the city safe, then let the whole place go to chaos.