noun. the region of wales, north of newport and cardiff. filled with pikeys, chavs, townies, basically low-class knob ends that love to fight for little to no reason, drink 24 hours a day and pop out new spawn every 9months (or sooner if they've managed to convince more than one girl to bone them)
a total shithole filled with shitheads.
... oh, and they're welsh on top of it all
go into newport on a saturday night and you can see all the chavs that have come down from the valleys fighting in the parks.
the boys from dirty sanchez are from the valleys