cover your ass
US /ˈkʌvər jʊər æs/
UK /ˈkʌvər jʊər æs/

1.
se proteger, se resguardar
to protect oneself from being blamed or criticized, especially by taking precautions or making excuses
:
•
He always keeps detailed records to cover his ass in case of an audit.
Ele sempre mantém registros detalhados para se proteger em caso de auditoria.
•
Make sure you get everything in writing to cover your ass.
Certifique-se de ter tudo por escrito para se proteger.