That’s interesting, consuelo.hi :)
Wonder if there’s any connection with the widespread UK argot chav, used to describe a youth high on bling and low on educational self-esteem?

Quinion records:
Chav is almost certainly from the Romany word for a child, chavi, recorded from the middle of the nineteenth century….
http://www.worldwidewords.org/topicalwords/tw-cha2.htm