There are multiple ways to say “I don’t care” (which is what the expression stated means). You can say “Juckt?” Which is very informal and basically means “is it itching?” Or you could also say “das geht mir am Arsch vorbei” which means something like “its going next to my ass” (I don’t really know how to translate it in a better way, but it means, that said thing is passing your ass)