This has been around at least as long as the 1980s: back then I was a teenager and had an exchange visit with this kid from Paris, I remember him describing how

This has been around at least as long as the 1980s: back then I was a teenager and had an exchange visit with this kid from Paris, I remember him describing how they flipped words around to make their own slang. One that stuck in my head was "chébran", a reversal of "branché", which literally means "plugged in" or "connected" but in the era of Minitel and other early networks was used to indicate someone who was hip to current trends.