interjection. A far more manly and Wookie-y alternative to aaaaaiiiiiiiieeeeeeeeeeeee!
Real citation: "I asked my Chewbacca Magic 8 Ball if I would have a good day. The answer: 'Aggrrttaaggrrttaaggrrtt.' No offense, but Chewie blows at this."
(Sept. 10, 2009, Crusty Juggler, Twitter, http://twitter.com/crustyjuggler72)
Made-up citation: "My bark is worse than my bite, but my aggrrttaaggrrttaaggrrtt is worse than either. It's even more repugnant than your mom."