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2.
Not to be confused with self-deprecating humor, self-defecating humor is NOT funny. A joke that bombs like a dump of crap.
Example: A joke about your own foibles that stinks!

Sorry,Man, I hate to admit it, but I like PB&J with bacon even though it always gives me gas. (Your admitting that is self-defecating humor.)

Too much information, Dude!
by sizcruz January 22, 2010
 
1.
The act of getting some cheap laughs by pooping one's pants.
Billy's lame jokes kept falling flat, so, desperate for a laugh, he decided to change course and try some self-defecating humor.
by Lord Nexus VI November 22, 2012