One whose social presence gives everyone around them an uncomfortable and painful feeling similar a dick in their ass.
"Man, Brian is such a dickass, he's rude and inconsiderate to everyone he knows. Having him around is about as bad as getting a dick in the ass. We shouldn't hang out with him anymore."
An insensitive, hard headed person whom gets off on giving another person or other people a hard time by annoying them with foolishness that's quite aggravating.