A chav is an idiot. The type of person who didn't pop out of their mum with a full bag of spanners and hangs around the shops listening to **** music through the speaker on their phone. If they're male they'll have an Anti-Social Behaviour Order (ASBO) by the time they're 14 and if they're female they'll be carrying a sprog at 16. Scotland have similar filth but they go by the name of "neds".
Argos is a big chain of high street catalogue shops. Famed for selling jewellery chavs like.
JD Sports is a spots shop. Chavs like to wear bags branded by them for some unknown reason.