A person that is the prime example of a douchebag. Maybe the term douchebag is too light a word to describe them. They think that they're all that and a bag of chips, and refuse to accept that they suck at life. Oftentimes they call other people douches because they are in denial of their own douche-ness.
"I pop muh collah and get all da bitches followin me around."
Bystanders: "Man, that guy's not just a douche, he's a doucheous maximus!"