We were organizing a bookshelf today. I discovered a fun little book titled "The Original Cockney Rhyming Slang". We had bought it on our visit to London three years ago.
Cockney rhyming slang is a slang said to be used in central London within hearing distance from the bells of St. Mary-le-Bow Church. The origin of it is said to be the need to confuse the authorities.
How it works is apparent from the following Cockey-English translations:
Aristotle = Bottle
Bacon and Eggs = Legs
Battle-cruiser = Boozer - pub
Bristol Cities = Titties ("A fine pair of Bristols")
Cape of Good Hope = Soap
Carving Knife = Wife
Cockroach = Coach
Dustbin Lids = Kids
Four by Two = Jew
Glasgow Rangers = Strangers
Khyber Pass = Arse
Pleasure and Pain = Rain
The dictionary is quite fun and I recommend buying the book if you happen to see it.