a very horny,ugly ass beast that is very human like in physical form. It has a vagina, penis and breasts so that it can fuck anyone that it wants to. Many that have been fucked by this type of monster have reported receiving sexually transmitted diseases. These monsters are believed to be invincible as no one has found its weakness. Because of this and the fact that they can chase down cars, they will catch you. Running away will only cost you your life and they will just fuck your dead body. It is believed that they live solely off of fucking.
I just got fucked by a sex monster and now I have HIV
by Shit Goose January 23, 2011
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1. a person who has sex a lot
2. a beast who has sex with other beasts
1. i am definitely a sex monster
2. wow, look at that sex monster, hollerrr
by ayla roman April 25, 2010
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A beast with wings that flies around grabbing people and taking them to his sex nest, where he rapes them so hard that they die, and then lays their body on someone's front porch to lure out some of its victims. These are generally found in the U.S. and are born from the invisible eggs that come from ejected semen.
Jim: Hey, what happened to Susie?
John: Oh didn't you hear? She was taken by the Flying Sex Monster!
by frenchfrypapa February 20, 2014
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