New words appear within the music industry quite suddenly. Have you any idea where these words were first used and why they now mean what they mean. Take the word 'Pop' for example. Barry Back 'Pop' is purely short for popular, as in popular music. Popular music, pop music, pop.
New words are very often fashionable words coined fast to describe a passing fashion.
Such words are often referred to as 'nonce' words. Since the world of music is driven very, very closely by questions of fashion, it is inevitable that the latest sensation is likely to be described and promoted as something in need of a new word. Often these words come about from cultures that are not familiar to the mainstream. A new word is born. While many variants of English have evolved, each with its own vocabulary and accents, there seems to be a threat that globalisation will eventually produce one more or less standardised form of English which is threatening to be 'Americanised' English.