Muskegon Downhiller Share definition Flag When you take a handful of pop rocks, spit in your hand, and jack off I was bored so I gave myself a Muskegon Downhiller Muskegon Downhiller by Dirtylew February 20, 2015 0 0 Get merch Get the Muskegon Downhiller mug. Buy Now — $32.95 See more merch