Musket Stuffer Share definition Flag Holding the shaft of your penis while stroking the rest of your penis with the other hand. So i was bored and had a little "Me time" and so i decided to masturbate. My friend caught me and called me a Musket stuffer. Musket Stuffer by Incogneto7 July 25, 2010 0 0 Get merch Get the Musket Stuffer mug. Buy Now — $32.95 See more merch