I've often wondered aboot the origin of words like "burke" as in idiot...
More commonly "berk" - Rhyming Slang from "Berkshire Hunt" = the "C" word again. Very rare to hear the term used with that strength, more usually indicates idiot/fool
A few fiscally related ones (some are London-specific)
Ayrton = tenner = ten pounds (from Ayrton Senna)
Bag of Sand = Grand = one thousand pounds
Beer Tokens = money
Copper = mixture of 1p & 2p pieces
Dosh = cash, generally
Fiver = five pounds
Monkey = five hundred pounds
Nicker = a pound
Nifty = fifty pounds
Half a Nicker = 50p
Pony = twenty-five pounds
Readies = money
Score = twenty pounds
Shrapnel = loose change
Silver = any combination of 5p, 10p, 20p & 50p pieces
Sovs = pounds. Short for sovereigns
Spondulicks = money
Squid = a pound
Ton = one hundred pounds
A few others, quite a few of which are derogatory...
Septic (Tank) = Yank
Nancy-Boy = Homosexual
Nonce = Paedo
Rodney = Plonker = Idiot (from very popular BBC sitcom "Only Fools & Horses")
Fuzz, Rozzers, Old Bill, Pigs, Filth = Policemen
Convict = Australian
Mother's Ruin = Gin
A Light Ale (as in "I went out on Friday & had a light ale") = three day bender of which you have no recollection and are now wondering where you are, who/what is in bed with you & where the traffic cone came from.
Drum = Flat/Apartment
Munter, Minger, Swamp-Donkey, (Grievous) Hoond = unattractive woman
Shreddies/Cacks (Kacks) = Male underwear, usually Y-fronts
Tube, Idiot Box, Goggle Box, Telly = TV
TV = Transvestite
Salmon = Tobacco or Cigarette (Rhyming Slang - Salmon & Trout, Snout [prison code])