One who is the combination of a pessimist and a douchebag. Usually has a constant annoying, negative outlook on life and anyones ideas except theirs. If told they are a pessimist, they will usually try to play it off by being even more of a pessi-docuhe.

Serious cases of pessi-doucheness may result in the argument of how .999...=1 when clearly no one gives a fuck, a constant reminder of some past-argument which had something to do with their pessi-doucheness, or the rejection of hanging out with babes because they think it wont be fun