I know people who still say 20 Sovs, for £20, when I was younger there was a fad for the £1 & 10/- notes to be called . a bar, and half a bar.
Then there was the 50 Piece, which they tried to nickname a 'Wilson' after Harold Wilson PM, because it was two faced, and many sided.
Nicker,and half a nicker, the list goes on and on.
G