currency slang...
($)Dollar = Pound(£)
Cent = Penny
Cents = Pence
Greens = reddies (paper notes, or money, as in "you got the greens?/you got the reddies?" when asking someone if they have the money to buy something) (because the ink on a US paper money is green, ink on £50 us money is red.)
Bill = Note
Buck = Quid
Nickle = 5p (we don't have slang for that)
Dime = 10p (we don't have slang for that)
Quarter = 25p (we don't have either slang for that or a specific coin)
a blue is a fiver, otherwise known as a five pound note. (called that because of the traditional ink colours0
a score is twenty, though this isn't applied just to money, you can have a score of anything, and scores of failures to your name, that's obviously american term as well, (hence three score and ten) (3 x 20 + 10, seventy) but it's notably not three score and a couple of monkeys ago.
a pony is £25, because in old india, (in empire times) there was a 25 rupee note with a pony on it.
a hundred pounds is a ton, which I guess is confusing because a ton of weight is 2240 pounds. because in the UK we use the long scale imperial system, - which is why our beers are bigger amongst other things than in the US where they use the short scale, or "queens" system. - this is also why a "hundred weight" in the US is 100lbs, but in Britain it's 112lbs)
but a ton of money is a hundred quid.
a Monkey is £500, again because of the picture on an Indian note. (500 rupee)
and £1000, is a grand, or "a bag of sand"
currency slang isn't half as interesting as the rest of British slang,
where getting pissed is a (fun) thing to do in the UK.
going off half cocked, doesn't mean wandering off with a bit of a chub on.
going off cock isn't a conversion from homosexuality
and cocking it up isn't anything to do with genitalia.