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Language students might argue about the use of the word jargon here - it's not really jargon as such (technical language associated with a given job or activity) but slang that they're really talking about. But it's an interesting snapshot of what's going on with slang at the moment and the influence of American English, London English and especially Black British English on mainstream language.
As with any guide to slang it's got a short shelflife, with new words rapidly appearing, to take the place of old ones. Words like ace and magic which were used as terms of approval when I was a kid (the 1970s if you must know...) got replaced by sick and wicked, and now words like nang, off the hook and gully (although they're probably out of date already).