An amalgamation of the words "sodomy" and "coitus", meaning "anal sex". The purpose of the word is to be able to refer to anal sex and still retain the satisfying feeling of saying the word "coitus" (which only applies to vaginal sex).
Girl: " *A Boy* tried to have sodoitus with me last night."
Her Best Friend: "Damn, what a closet case."
Girl: "Yeah, and santorum is so gross too!"
Her Best Friend: "Ew, WTF is santorum?"
Girl: "You don't know? Well, let's just say that's one big reason never to have sodoitus in the first place."
Her Best Friend: "Whatever."
by TheRobsta June 27, 2011
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