(UK Usage) - Almost Insane, usually in a socially acceptable manner. Often used to describe the behaviour expected of some (rural) old money families and more a likable eccentricity than a true mental disfunction.
By god, their all barking mad, colonel!... See if they'd like to come for supper next week when we have the Hybrid-Smyths over. I think they'll all get on famously.
The lesser known Rural Chav displays the same characteristics as the regular (or common) Chav, the major difference being that the Rural Chav lives in a village rather than a town or suburb and probably has furry dice in his/her tractor rather than a "hot hatch" and styles their hair with lard.
If one were to draw a comparison between Chavs and Pigeons, the pigeons you find in rural woodland (akin to Rural Chavs) carry less diseases than their urban cousins (The Common Chav) but are still essentially flying rats!
Tall leather wellington boots with Gore-Tex inner manufactured by the same Irish company who make dubes deck shoes. The Dubarry's (leather wellingtons) are more prevelant in the UK than in Ireland and while still a status symbol and commonly worn by sloane Rangers these boots are also widely worn by real country folk, horse people and even some chavs.
Sloan Ranger usage: Darling, did I leave my Dubarry's in the back of your Range Rover, there's a puddle outside Oriels?
Common Coloq Usage (UK): Where the f***k's me Duubries - it's pissing cats and dogs out ere and there's mud up to me fanny!