Usually more associated with poorer, urban environments.
An unruly, young person, typically wearing casual, brand-name sportswear, such as Nike, Adidas and Reebok. Chavs are generally viewed as an ignorant under-class with a propensity for criminal or loutish behaviour.
Also used as a euphemism for 'fuck' in expressions such as the denial - "Did I chuff!
E.g."She chuffed just as we were saying grace before dinner" Noun.
Watch some TV, drink a little wine, and go out clubbing tomorrow night?