aggrovert

n. An aggressively extroverted person. A person who's extroversion is directed at one or more people with disregard for how their conversations or conduct are perceived by others or how uncomfortable others are. A person at the extreme end of the introvert-extrovert spectrum.
n. A person who's personality is characterized by aggroversion.

Raul's party was fine until this aggrovert latched onto me after every one else told him to piss off.