Dozy Twonk... Dozy is someone whos not awake, or doesn't seem to be anyway. Twonk is a fool or idiot, More often you'll hear Dozy Mare, which is Dozy Woman.
Gradely is specific to North England, (Yorkshire or Lancashire) and isn't used much now, It means something that is simple, good quality, honest and decent.
Knacker comes from Meat that isn't suitable for humans, Knackers mean testicles, Knackered means Tired, Exhausted.
Oxtercogging (also from the North) means going 'arm in arm' together, like holding hands.
Netty is a geordie (someone from Newcastle upon Tyne) word meaning public or outside toilet.
I think Dougie means Stupid, or someone that does something foolish, but not too sure.
British people should be proud that some of us still try and use the true british languages, rather than the bastardised 'English' (derived form Germanic, Greek, Latin and Italic langauages).
It's also interesting to see the earliest forms of English being used in USA, rather than the snobbish overspelt words we now use. (for instance Thru / Through)
~gets off soapbox~