Slippery Dylan Share definition Flag The act of tongue punching your grandma, usually unexpectedly. The other night I walked in on my sleeping grandma and I put my tongue in her anus, in other words I pulled off a "Slippery Dylan". Slippery Dylan by SeedyRay May 29, 2017 0 0 Get merch Get the Slippery Dylan mug. Buy Now — $32.95 See more merch