A person who, no matter what the situation, will choose the worst course of action. They appear to be compulsively driven to make poor choices, stupid comments and even worse life decisions.
This person is often caught up in small details that have little if nothing to do with the larger picture, or situation at hand.
WTF dude! This is the third time today you've got your dick caught in the vacuum. You must be Obsessive Retarded.