Everyone has now heard the story of the Chevy Nova and its inexplicably poor sales record in Spanish speaking countries. Today, walking past General Dufour's statue on my way home, I saw the French version: a truck with the name "KHEOPS CONSTRUCTION" on the side. I've just looked them on the web. They're apparently a successful company that's been doing business here in Geneva for a while.
Well, perhaps the slang in Izzo's book is very specific to Marseille - I'm sure I don't know. But in that part of the world, at any rate, "total khéops" apparently means something like "complete fuckup"...