Judas Priest
/ˌdʒuːdəs ˈpriːst/noun
Informal (chiefly North American ). In oaths and asseverations: = Jesus Christ. Compare B. Now rare.
exclamation
Informal (originally and chiefly North American ). Used to express shock, surprise, etc.: ‘Jesus Christ!’.
Origin
Mid 17th century (in an earlier sense). From the name of JudasIscariot + priest.