French might be the language of Marcel Proust, Jean-Paul Sartre and Marguerite Duras, but it also happens to be a language which evolves and adapts very quickly. Therefore, the words you find in textbooks sometimes turn out to be completely outdated and might even cause native speakers to wonder what the word you just used actually means. Okay, that may be a bit of an exaggeration, but it’s always useful to have a few current slang words in your own vocabulary. Once you reach a fluent level of French, these will be the words that bring you a step closer towards proficiency.