Mathijsrock Share definition Flag A tiny rock that you will not see until the moment you fall over it, predominantly on a skateboard Fuck that hurt! All these Mathijsrocks on the halfpipe are fucking annoying! Mathijsrock by MSTJ September 27, 2010 0 0 Get merch Get the Mathijsrock mug. Buy Now — $32.95 See more merch
