Using his database of 130,000 words and phrases, the lexicographer known as ‘Mr Slang’ explains the origins of some of the most witty, colourful and disreputable expressions in the English language. He takes us into the worlds of boxers, drunken sailors, doctors and lovers, as well as the more literary realms of PG Wodehouse and Shakespeare, that master of the double entendre who is the earliest source for nearly 300 slang terms.