Semen Slayer Share definition Flag A Semen Slayer is when a person cuts a slit in their partners ballsack and sucks the semen out of it. My uncle is a Semen Slayer. Semen Slayer by niggafart420 April 21, 2022 0 0 Get merch Get the Semen Slayer mug. Buy Now — $32.95 See more merch