sorry if it was a little localised!

Dunno if it's localized. It just hasn't made its way into my own personal lexicon. I don't think we tend to get much localized new slang these days. Things get created at whatever level and swapped around in the great American melting pot, the colleges and universities. You might get some lower class ghetto stuff stays localized and there's always old regionalisms that hang on, but even they are dying out. Anyone knows Bostonese know if they still talk about frappes?