Splooge Knuckle Share definition Flag The act of masturbating and cumming on your knuckles and then punching someone in the face. Trudeau really pissed me off so I gave him a splooge knuckle. Splooge Knuckle by Jpow September 14, 2018 0 0 Get merch Get the Splooge Knuckle mug. Buy Now — $32.95 See more merch