there's a new sheriff in town

there's a new sheriff in town

A new figure of power and authority is now present, and they are going to be more forceful, effective, or strict. A: "Our last manager didn't make us log our hours in such detail like this." B: "Yeah, well, there's a new sheriff in town, and that's the way I want it done." The incoming district attorney made it clear that there was a new sheriff in town, and she was aiming to clean up the streets.
See also: new, sheriff, town
Farlex Dictionary of Idioms.
See also:
  • let up on
  • fade up
  • knock (one) sideways
  • knock somebody sideways
  • knock someone sideways
  • push up against
  • push against
  • with a bang
  • iron hand
  • an iron hand