An instrument belonging to the bowed string family that resembles the common viola in size and shape. A notable exception is in the setup of the strings. Instead of four tuned steel strings, the graybola features only a single string, untuned, and comprised of a single, long strand of ass-hair. The graybola was made famous by rising folk prodigy, Zachary Addison. The instrument was most notably used in Addison's hit single, "Over the Hill."
by Disgusting Dave Murphy June 15, 2007