cut someone some slack
US /kʌt ˈsʌm.wʌn sʌm slæk/
UK /kʌt ˈsʌm.wʌn sʌm slæk/

1.
对某人宽容点, 放某人一马
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.
他是新来的,所以对他宽容点。
•
I know she made a mistake, but cut her some slack; she's been under a lot of pressure.
我知道她犯了个错误,但对她宽容点;她承受了很大的压力。