Where did chavs come from ?

So I’m British and growing up in the 90s , teens in the early 2000s there was definitely the whole chav vs Emo thing . I was watching a film called Kidulthood yesterday that I remember one of the chav girls Elisha brought in to play on the tv as a last day of term English lesson treat ! (Bold move !) So it had me thinking where the hell did the whole trackies/ fake Burberry caps , gold plated , sovereign ring, antisocial behaviour, slicked back pony and buzz cut lines in the brows thing even come from ?

They use words like man dem, dizzy blood, sket ect … Was it an adoption of black culture? Ofcourse the Hood movies are set in London but I’m from Somerset and it all happened down here mid 2000s too …. And now the fad has completely vanished it seems .

Was there something that kicked the style off ? There’s many questions here I know and I understand it’s just a trendy subculture but there has to be more to it …. Emos didn’t make half as much of a splash