Here is a dictionary of rhyming slang. By no means all of it is current. Any tourists who walk into a London boozer and try using it will get some very funny looks. Not advisable.

And if you click here, there's a picture of the fella with the gong, and a bit about what he was there for. He wasn't J.Artghur Rank, who was much too respectable and important to get his kit off. (It takes a bit of a time loading, because there are lots of other pictures as well.)