Geek Fiddle Share definition Flag A mean way of saying guitar in order to piss someone off. Jerk:"Oh hey, I see you are playing your geek fiddle" Guitarist:"It's not a geek fiddle!!!! Geek Fiddle by Groidica February 14, 2013 0 0 Get merch Get the Geek Fiddle mug. Buy Now — $32.95 See more merch