Wondering what the "Yardie" gangmembers are saying in The Getaway? You can learn Jamaican slang on the web with the Dictionary of Jamaican Patois, or at Speak Jamaican.
Speaking of slang, I've been wondering where the practice of saying "ah-ite" for "alright" came from. My brother says this but I don't know where he picked it up. If you know where this comes from, or have a theory, email me.