ὁ λαγὼς τὸν περὶ τῶν κρεῶν δρόμον τρέχει → save one's bacon, save one's neck, save one's skin
(2) Fĭdēs,¹² ĕī, f., la Bonne Foi [personn.] : Cic. Off. 3, 104, etc.