Semen Puppy Share definition Flag A person who alive thanks to a sperm donor and may not know their ethnic background; a mutt. Where are you? Puerto Rican? Cuban? Scottish?I don't know. I am a semen puppy. Semen Puppy by MKCOMEDY January 13, 2013 0 0 Get merch Get the Semen Puppy mug. Buy Now — $32.95 See more merch