Cockney Rhyming Slang was invented in 1974 by the CIA as a way of transmitting coded messages to agents across the world.
It was based loosely on the lost native language of the Cockerni tribe of East London, a small and inbred group of proto-humans that thrived in the Bronze Age. Cockernis were noted for their peculiar forms of native dance, which they would break into at the drop of a wallet, and their fascination for adorning their bodies with shiny beads and pebbles (or ‘pearls’ as they called them). The tribe was ruled over by a King and Queen, who were more often than not both brother and sister and husband and wife, and survived for many centuries before being wiped out in a violent civil war.