get-out-of-jail-free cardnoun [ C ]
uk/ˌɡet.aʊt.əvˌdʒeɪlˈfriː ˌkɑːd//ˌɡet.aʊt.əvˌdʒeɪlˈfriː ˌkɑːrd/informalsomething that allows you to avoid an unpleasant result of your actions, for example a punishment or duty:
He warns Americans that their nationality is not a get-out-of-jail-free card if they break the law abroad.