honor among thieves

Etymology
From.

Noun

 * 1) Trustworthiness within a group that is not considered trustworthy by outsiders.

Translations

 * Finnish: varkaiden kunnia
 * Greek: μεταξύ κατεργαραίων ειλικρίνεια
 * Hungarian:
 * Polish: wiarygodność wśród niewiarygodnych
 * Spanish: entre bueyes no hay cornadas