I found this article on the history of slang in the English language quite interesting. The fact that we have an entire dictionary dedicated to the recording of slang expressions is a notable achievement. Certainly I have always enjoyed the sheer diversity and entertainment of slang expressions in English; they seem to have a certain power and intensity to them that is not as evident in other languages. I’ve never been quite sure whether this is true, or whether I simply think it is because I am English.
What is true is that we have an unparalleled propensity to invent slang; from my early involvement with the Blackadder TV series and the linguistic genius of Ronnie Barker, The English have retained real creativity when it comes to the introduction of new words to describe people, situations and emotions.
Take a read.