Superlative form of unholy: most unholy.(adjective)
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Use "unholiest" in a sentence
"And so while the Chamber Singers from Miami Dade college belted out the holiest of songs, I asked the lesbian next to me the unholiest of questions: how long until you normally go down on a girl?"
"B - is for Buffalo: Neither would it have been when a few weeks earlier, the boys in blue, blew by blowing a 4-1 third period lead in the unholiest of holes - Buffalo."
"“I just laughed till my sides ached…It was the unholiest gang that ever cavorted through Palestine, but those are the best boys in the world.”"