unholy

adjective2

1. •
   Not holy; (by extension) evil, impure, or otherwise perverted.

   • The priest's unholy behaviour brought the church into disrepute.
2. •
   Dreadful, terrible, excessive, or otherwise atrocious.

   • What an unholy mess your room is in!
   • I've been spending an unholy amount of time trying to write a novel!