physical union of male and female genitalia accompanied by rhythmic movements usually leading to the ejaculation of semen from the penis into the female reproductive tract
Kris Ann's sister was shocked when I informed her that we were preparing to engage in coitus.
by Beau December 05, 2003
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Scientific reference for 'doing the dirty', having a 'no pants dance', or advancing courtship. Coitus is commonly used in a popular TV show, The Big Bang Theory.
Penny: *opens door* "Hey, my power's out, can I stay here for the night?"
Sheldon: "Do you really-"
Leonard: "YES, of's what friends are for, after all. Lending a room in a time of need."
Sheldon: " long as this doesn't end up in Leonard and Penny taking part in coitus, I guess I can live with it for one night."
by IHasAWolfie January 01, 2014
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The way a child with a speech impediment pronounces "Curtis." Hilarious when heard aloud.
Little Joey at 7 years old: Coitus, stop eating paste.
Little Curtis at 7 years old: Stop calling me that, fuckhead. Don't you know what that means yet?! And this paste is delicious, so hop off my nuts.
by GONZO! April 16, 2006
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A sciency-sounding word for SECKSSS. Sheldon Cooper from the show The Big Bang Theory often replaces the word "sex" with "coitus".
Penny, did you engage in coitus with Leonard last night?

I had coitus with Amy Farrah Fowler last weekend... BAZINGA!!!!
by trajiniqa September 04, 2012
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1. Sex
2. Formal terminology often used by the 'super intelligent' to describe the love-making process, every little boy's dream
Hey baby, let's go for scones then we can catch a round of coitus.
by deplemisher April 24, 2003
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