I think it is everywhere in the english language world. It might not be in common usage but most adults would know the meaning. Butt is such an innocuous word

I think it is everywhere in the english language world. It might not be in common usage but most adults would know the meaning. Butt is such an innocuous word for arse it is used by preschoolers and cartoons. It isn't offensive to anyone and clearly it no more means arse in this term than it does when referring to the end of a cigarette or gun or hitting someone with your head. I once had a client see a server monitoring package refer to daemons and I thought I was going to be the victim of a satanic panic but I quickly pointed out how the spelling differed from the usual biblical version and that a bunch of hippies in california in the 60s were into mythology and the name stuck. People are weird.