Martiansexual Share definition Flag The act of having sexual intercourse with or being attracted to the alien race. Dude, that's creepy! You find that alien attractive? You must be martiansexual!!! Martiansexual by DKRemedy February 12, 2021 0 0 Get merch Get the Martiansexual mug. Buy Now — $32.95 See more merch