Plinkage Share definition Flag When water splashes up from the toilet onto one's sphincter as a result of a turd dropping into the bowl while taking a dump. "Dude, I got some serious plinkage on that last dump...my ass is all wet." Plinkage by Rod Swain April 24, 2006 0 0 Get merch Get the Plinkage mug. Buy Now — $32.95 See more merch