Caveblocker Share definition Flag A giant, crucial bowlwinder that collapses into a shitmass that blocks the part of the toilet where the water goes down. Bro, I unleashed a caveblocker and clogged the toilet. Caveblocker by poondoggy April 13, 2009 0 0 Get merch Get the Caveblocker mug. Buy Now — $32.95 See more merch