To shit oneself. From the word "defecate," meaning, "have a bowel movement." And the word, self, meaning "One's identity."
"Yo, did you see that guy? He was totally self-defecating!"
by MoreAwesomeThanThisGuy! March 6, 2010
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After doing an Alabama Hot Pocket or any familiar sexual act, the crap that you inserted inside the vagina,mixed with cum and vaginal fluids, will start pouring out of the vagina, making a vaginal defecation.
Guy 1: "Dude, Michelle took that Alabama Hot Pocket like a pro last night. and her Vaginal Defecation was more fluid than Niagra."
Guy 2: "Oh man, hope you took it in the mouth like it's supposed to."
by Aly8188 June 11, 2015
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A person, who by virtual of their physical size or dietary habits, produces bowel movements that dominate the fecosystem.
Ben froze in his tracks and backed slowly away from the stall, breathing only through his mouth. From the carnage within, it was clear he had blundered into the lair of an apex defecator
by The Working Dead July 1, 2016
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a female manipulator band of ~7 members, all of which are in the 8th grade.

female manipulator culture and music is commonly seen in bands like Hole, Destroy Boys, Girlpool, etc.
Gia: Self Defecation just released a new hit single, "shock ya pussy!"
by row man April 21, 2022
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The act of causing someone great pain by violently defecating onto them to experience extreme pleasure.

Could also be the act of defecating into the water supply of an entire city in order to receive pleasure from the thought of thousands of people drinking your "rrhea".
*Janitor walks into a dirty bathroom*
"My God... looks like some sado-defecism has been going on here."

"Hey toss me another can of that sado-defecism!"
by Loch February 18, 2005
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A sudden and urgent need to drop a monster mud bomb out of your hind quarters.
Our first date was going fantastic, but then out of nowhere that burrito I ate reared its ugly head and I had a defecation situation on my hands.
by MaulerMMA October 10, 2013
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Essentially, a "shit fight". A defecation altercation is an expression of extreme anger and frustration. Occasionally, it may be synonymous with "shit fit", or the throwing of feces.
That's it, we're gonna' have a defecation altercation. Betch.
by anonyfawks August 4, 2010
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