cut someone some slack
US /kʌt ˈsʌm.wʌn sʌm slæk/
UK /kʌt ˈsʌm.wʌn sʌm slæk/
1.
to be less critical of someone or to allow them more freedom to do something
:
•
He's new to the job, so cut him some slack.
•
I know she made a mistake, but cut her some slack; she's been under a lot of pressure.