Chockstone Share definition Flag A climbing/canyoneering term used to refer to a stone wedged in a crack or between canyon walls. In 127 Hours, Aron Ralston dislodged a chockstone and got his arm stuck for five days. Chockstone by Maðurinn July 23, 2012 0 0 Get merch Get the Chockstone mug. Buy Now — $32.95 See more merch