A corruption of glitteratti, meaning the hoi poloi or high
society. In this
case it's the complete antithesis. The
celebrity chav and their associates.
Usually used in association with
rich and successful, by their own standards,
chavs. EG. lower league footballers and the women who try to sleep with them or reality TV idiots. The chaveratti were out in
force last night at Ritzys nightclub in Romford.