8 mile-ing Share definition Flag When you dump astro glide on an 8 mile slip and slide using a mountain bike, and then go down the slip and slide on your erect penis. So Tim, did you hear about the guy who went 8 mile-ing the other day? 8 mile-ing by cajungeek March 5, 2020 0 0 Get merch Get the 8 mile-ing mug. Buy Now — $32.95 See more merch