Verlan

Verlan (pronounced [vɛʁlɑ̃] ) is a type of argot in the French language, featuring inversion of syllables in a word, and is common in slang and youth language. It rests on a long French tradition of transposing syllables of individual words to create slang words. The word verlan itself is an example of verlan (making it an autological word). It is derived from inverting the sounds of the syllables in l'envers ([lɑ̃vɛʁ], "the inverse", frequently used in the sense of "back-to-front"). The first documented use of verlan dates back to the 19th century, among robbers.