Before reading this article, I invite you for a better understanding to read the article about the verlan in French, I will mention it a lot in this article: Verlan: The Backward French Slang.
You will need it to understand the locals, the movies, and the songs. You will realize that the most important words are French slang words. There is always a huge difference between the language that you are learning in the classroom and the language that you are learning in a specific country.
