The easiest spoof on Christmas carols would be playing off “Do You Hear What I hear” with “Do You Fear What I Fear?”
The Dagon Tabernacle Choir from the album A Very Scary Solstice have Lovecrafted the song with various unprounceably spelled demonghouls.
My Newfoundland favorite, Snook, has developed an odd epic of failed life dreams to this tune. It’s pretty Freudian/scary. His is “Do You Fear What I Hear?” (Not on the ‘tube. Yet.)
So the winner of festivalisophobia is Dave Rudolf. Dave’s a novelty musician from way back, the kind of guy you saw at some show somewhere and couldn’t believe how funny he was. Unless you travel in the 21st Century Vaudeville circuit you may not have heard of him. Check out his website.