get off someone's back
US /ɡɛt ɔf ˈsʌm.wʌnz bæk/
UK /ɡɛt ɔf ˈsʌm.wʌnz bæk/

1.
to stop annoying someone or criticizing them constantly
:
•
Please just get off my back! I'll do it when I'm ready.
•
His boss needs to get off his back about the report; it's almost finished.