TIL that in Iceland, "playing chess with the Pope" is a phrase that means to defecate.

https://grapevine.is/mag/articles/2019/09/27/just-sayings-ad-tefla-vid-pafann/

https://www.reddit.com/r/todayilearned/comments/1518ypu/til_that_in_iceland_playing_chess_with_the_pope/