Aww, you silly Brits.

My buddy (we're from Canada) went to Australia for some time. He was a smoker, and lived with a bunch of other smokers. In Canada, if you want to ask someone for a smoke, you say "Can I bum a smoke?". In Australia, it's "Can I get a fag?" In the spirit of international cooperation, the expression soon became: "Can I bum a fag?" Much maturity.