'Chav' is of Gypsy origin. Chavvi = child, boy or lad. Therefore, a chav means a lad, literally. But in common parlance it means an ignorant, delinquent, uneducated lower class thuggy lad. What the Americans call 'white trash'. Similarly, the word 'yob' ('boy' backwards) was used in the same way until recently. Recently the abbreviation 'Council House And Violent' was put to the term chav, but that is not the true origin , as I've just explained. In Scotland chavs are called 'neds' (going back to the 'Teddy Boys' of the 50s), but recently have had the abbreviation Non-Educated Delinquent put to them. Again not the true origin.