Noun, A dark entity consumed by the insiatiabke urge to gargle all the cum in the universe and other multiverses.
"Oh no there A Semen Demon draining my love eggs, pack your dick n balls and rum for your sperm count Aaaaaarghh!!!!
A monstrous being that produces sperm, also known as the human male.
"I'm happy that I broke up with my ex boyfriend, I don't need that semen demon in my life"
Semen demons tend to live inside teenagers rooms. Teenagers have the most semen and they tend to feed off of it. They also attack you mid masturbation they do that because they can smell your semen gaping inside of you.
Me: masturbating semen demon starts to suck my dick ferociously.
A male cum slut that is hot and will do very evil things for cum
Look at that semen demon over there