Top Definition
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 05, 2010

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A term that stupid people use accidentally when they really mean "self-deprecating" and clever people use on purpose to make poop jokes that stupid people wont get.
The big-time CEO used self-defecating humor to try and relax the crowd. He wanted them to see that he was just a regular guy. Unfortunately, he succeeded only in relaxing his own bowels. No amount of good press will clear that stink.
by Rickter Scale April 18, 2010

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To intentionally or unintentionally shit one's pants.
Man: What's that horrid stink? Have you shit yourself again?

Man 2: I've been self-defecating.
by lightheaded2687 March 05, 2010

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Similar to self-deprecating, only unintentional and so bad you might as well poop all over yourself.
Did you hear Joe Biden's latest comment on obama's big stick? He has a totally self-defecating sense of humor.
by troy nc April 27, 2012

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To unintentionally demean one's self. To unthinkingly place one's self in an unflattering light.
People who minimize their genius are self-deprecating. People who eulogize their ignorance are self-defecating.
by Chicagodmt June 11, 2009

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