unreverend

adjective2

1. •
   (no longer used) disrespectful; irreverent.

   • To justifie the Church of England, and true Protestant Religion,[…]from all allowment and approbation, of any such unreverend, blasphemous, and reproachfull language, against Soveraine Majesty. — 1648
2. •
   (no longer used) Not reverend; unpraiseworthy.

   • Long grey unreverend locks befouled with mire. — 1880