get off one's case
get off one's back
get off one's tail
To stop bothering and constantly checking up on someone; quit hounding one.
"Get off my case!" he cried angrily. "You're worse than the cops."
To stop criticizing or nagging someone.
"Get off my back! Can't you see how busy I am?"
get off one's tail
To get busy, to start working.
OK you guys! Get off your tails and get cracking!