@freemo "holy" means "set apart". So unless you have set a particular moley apart for religious purposes - it is an ordinary moley. A moley becomes sacrilegious when a holy (set apart) moley is desecrated, or an ordinary moley is used to mock holy moleys.
@freemo What I kept hearing with your original joke were the countless Batman sitcom episodes I watched as a child, and Robin would exclaim: "Holy ____ Batman!" Fill in the blank with some especially ludicrous aspect of the story.
https://www.buzzfeed.com/spenceralthouse/the-definitive-ranking-of-robins-exclamations-from-batma