A more serious version of the Party Pooper. This individual shows the same behaviors. The difference is that just when you think this individual is done with their behavior, they come back and screw up your party even more.
Guy 1: Man. This is so lame (additional bitching)
Guy 2: Dude, stop being a party pooper.
Guy 1: fine whatever
(10 mins later)
Guy 1: Man this is so boring.
Guy 2: Ok. Now youre just being party diarrhea