Guitarthritis Share definition Flag A guitar related impairment of the hands triggered by overuse or medical condition. I can't seem to play full-size guitars anymore, my guitarthritis is acting up, I guess I'll have to switch to mini guitars. Guitarthritis by MGSPrime December 11, 2025 0 0 Get merch Get the Guitarthritis mug. Buy Now — $32.95 See more merch