Proof that this forum has practical uses: I was doing a cryptic crossword on Sunday and one of the answers was clearly a US term for money. It turned out to be 'cabbage', a term I'd not heard before seeing this thread.
OMG I haven't heard the word ''nicker'' used since I was a child in reference to money!! I'd forgotten all about it..
I've heard and used some of the American words for money mentioned here. In southwest Texas we used the Spanish word 'dinero' for money. And growing up it was said of someone who had coins in his jeans that he had or had access to money. A colorful language we share.
A friend reminded me of a rather more obscure one that I omitted. Ten pound notes are commonly known as tenners in the UK and now and then you'll hear somebody ask if you can lend them a Pavarotti.