How British Gay Men Used To Talk: A short film featuring Polari, the cult language of UK homosexuals derived from theatre and circus slang, popularized in the 1960s by the camp radio characters Julian and Sandy. Need a dictionary? Or a translated Polari scene from Velvet Goldmine?
Cor, Blimey Guv'nor! It's the English/Cockney Rhyming Slang Dictionary! Very useful if you don't know your John Cleese's from your Duke of Kent's. Once you've mastered the art, you'll have no trouble understanding this passage.
Ooooh, those trendy young Brits and their funny new words. What I can't help wondering is how many people have been sending in made up slang. (via clog).
Just in case you're in Britain and happen to commit a felony, don't be caught unprepared. Visit the site of HM Prison Service and get up to date with your British prisoner slang.