cover someone's back
US /ˈkʌvər ˈsʌmˌwʌnz bæk/
UK /ˈkʌvər ˈsʌmˌwʌnz bæk/
1.
to protect someone from harm, danger, or criticism
:
•
Don't worry, I'll cover your back during the presentation.
•
A good leader always covers their team's back.
to protect someone from harm, danger, or criticism