retourner sa veste betyder på engelska

go rogue▼◼◼◼(switch allegiance, affiliation, or membership)
verb

turn one's coat▼(to turn against a previous affiliation of allegiance)
verb
[UK: tɜːn wʌnz ˈkəʊt] [US: ˈtɝːn wʌnz ˈkoʊt]