Definition of Holy Joe in English:

Holy Joe

noun

informal
  • 1A clergyman.

    • ‘When I was in the Air Force, we called our chaplain a "Holy Joe."’
    clergyman, clergywoman, priest, churchman, churchwoman, man of the cloth, woman of the cloth, man of god, woman of god, cleric, minister, preacher, chaplain, father
    View synonyms
    1. 1.1 A sanctimonious or pious person.
      • ‘"He was a bit of a holy Joe, to be honest, but everyone liked him," said a contemporary at Trinity. "One of his best pals was the college chaplain."’
      • ‘Now I am not painting John as a Holy Joe, it is just that the lad is sensible.’
      • ‘Now do you really think that a Holy Mary would violate God’s Word?’

Origin

Late 19th century: originally nautical slang.