a term "created" by the character guido carosella (AKA 'strong guy') from the Marvel comic book X-factor
in the 1990s. It denotes a self-absorbed person that is ignorant of the world around him but is not a "stupid-head."
"guido, is that guy a blork?"
"him? nah, he's a stupid-head, blorks are much more self-absorbed. remind me to hit him later."