The dictionary is half-right. There's no real way for me to explain what neds/charvers are:
I thought the word 'charver' was unique to Geordieland. In Leeds they call them (I think) 'doods'.
Anyway, it's easy to recognise them:
Hair:
Male: Far too much hair gel, always combed foreward, the fringe is almost glued to the forward.
Female: lots of hairspray, and a razor-sharp-sticking-out fringe. Often died blonde or highlights.
Clothes:
Both: Bomber jackets, usually made by Kappa. These are huge puffy jackets, often bright red, or navy blue.
Sports shops such as JD Sports are the main source of charver clothes. Things like stripey jumpers and quite often coodiroy pants - you'll know what I mean if you look in JD sports. Oh - and the old man flat cap is quite popular in charver males too.
Jewellery: MASSES of it, in male and females. Gold soverign rings for both sexes. Females will have plenty of tacky ear rings.
Accents: This may be another north-east thing, but charvers don't use the local (Geordie) accent! They have a strange kind of twisted-words voice that's difficult to explain.