I had a roommate I now refer to as "The Dickhead". Seriously, even one of my younger profs who comes to the CompSci club meetings knows him as "The Dickhead".
This is just one of the many stories, but I think it sums up how much of an asshole he was. We all shared food as we're students and it was simpler (we all ate about the same amount). One day I decided to cook some frozen chicken burgers and I ask my 2 roommates if they want some. One says yes, the Dickhead says no. Once I take them out, the Dickhead asks, "Where's mine?" He tells me I never asked him, and that he wants one. My other roommate corroborates my story, but to avoid the impending shitstorm of an argument, I just throw one into the oven. After I take it out and turn off the oven, I head out to hang out with some friends at the bar. I get home around 2am and guess what I find on the counter? His uneaten chicken burger. I was pissed and drunk enough that I decided to eat it out of spite and then the next morning, he has the gall to chew me out for eating it!
And that's why I call him "The Dickhead". Oh, and he drives less than sober. I should change it to "The Dangerous Dickhead"
EDIT: Oh yeah, and he only cleaned his room. All of his messes in the kitchen and the bathroom weren't his problem, according to him.