From alteration of papist.

• (British, America) IPA: /ˈpeɪpɪʃ/

papish

1. (now Scotland, Ireland, chiefly pejorative) Roman Catholic.

• popish
• Romish

papish (plural papishes)

1. (now Scotland, Ireland, chiefly pejorative) A Roman Catholic.
   • 1749, Henry Fielding, Tom Jones, Folio Society, published 1973, page 442:

     ‘But how can he have any right to make us papishes?’ says the landlord.