Yes, I made this word up. Deal with it. :P Besides, I've been using is word for years now, and some of my friends now use it as well.
Uses/etc: - "Fwah" is a negative word. - It is most often used as a exclamation or a sound which expresses a negative feeling. Example: "Fwah, I failed my history test!" - Sometimes "fwah" can also be used as a noun, but a fwah is not something that one would want to be. Example: "You crazy fwah!"