A chav is a like a British white trash or redneck person (like Jordan). There is a really funny website about them,
www.chavscum.co.uk. CDG is the Paris airport. The woman I saw with the YSL muse had horribly died hair, was overly tanned, tons of makeup, fake french manicure acrylic nails, wearing a super tight white tank top (it was freezing on Sunday in Paris, WTF?) and tight jeans that pushed her muffin top over the top so it was peaking out of her tank and she was chewing on a huge piece of gum. I will probably be struck by lightening tonight for being so mean, but it totally turned me off to see her with such a lovely bag. Gross.