(1) A person who acts like a complete irresponsible moron one night (such as getting blasted drunk, gambling away a couple mortgage payments, dancing half naked on a bar) and, the next morning, annoints himself as such.
Someone else cannot annoint a King, subject to a rare exception.
(2) An exception to the self-annointment rule occurs when someone is an absolute total douche bag, and calling him such simply won't suffice.
(1) Q: So Mike, what did you do last night?
A: Oh, you didn't hear? I got hammered and spit food all over Mothers bakery. Then I went to the Casino, was up three thousand, but lost it all and another three thousand. I was King of the Douchebags.
(2) Kevin: Man, that guy with the sunglasses and diamond earrings is a total douche bag.
Mike: No, he's KING of the Douchebags.

by Kevin Muscoreil August 7, 2007
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1.)A person who is so insensitive and/or unintelligent that they have successfully exceeded the qualifications of a douchebag. Also Queen Douchebag if female.

2.) A chemistry teacher who assigns to much unnecessary work to his/her pupils.
1.) KD: I think Bush was the best president yet.
Bob: Shut up you King Douchebag!

2.) KD teacher: O.K class, your'e homework is page 200, problems 1-115
Student: No Mr. Herbig! Please don't be a King Douchebag!
by tortured AP chem student November 21, 2010
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