Not sure about the first question (although I remember seeing a little lit up santa claus mentchy in someone’s window when I was little and my older brother told me that we should spit at it [not literally at it, it was on a second floor but towards it])
About the second question, I was brought up in a house where it was called “Kratz Mich” (not sure but I think that’s the pronunciation and it’s supposed to me scratch me)