The word Janaf, pronounced exactly as it sounds, is a near infinitely definitable word. Discovered by two young men in the year 2010, it is one of the newest of its kind. its use in speech is much like the word "fuck". Although it is most commonly used to describe the undescribeable, one may also use it as a filler word during akward silences or to call someone out for saying something that is completely bullshit.
Professor Greene: "you know kids, i actually invented gravity."
Little Tim: "what the Janaf Mr. Greene? No you didn't!"