A douchebag of high douchebaggery in the feudal world that often kidnaps a princess(of his own kingdom) instead of saving one. In the modern age though, a sir douchebag just has extremely douchebaggy-like qualities, but higher than that of a regular douchebag and lower than that of prince douchebag.
Douchebag: Okay, I beat up those first graders and took their lunch money so that way I could afford enough money to buy an Xbox One and show off my wealth with it even though the PS4 runs more powerful at a lower price.
If there was a Land of Douche, King Douche would dub his number onedoucher "Sir Douchealot". A complete, utter, and absolute ass hat, fuck ass, and fagol. A doucheopotamus.
"Bro, out of all the people at that bar, Larry should definitely be dubbed Sir Douchealot."
"After he showed her his pokemon cards, she spilled her drink on him and said ' You are Sir Douchealot, the prince of douchebaggery' and left."
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.