An Overgeek. A geek who is either extremely geeky, or highly admired by geeks with similar interests. It is sometimes used as a humorous spoof of the German word "ubermensch" (a person with great powers or abilities).
Jamie speaks Klingon and Elvish fluently and actually writes poetry in both languages. What an ubergeek!
One who displays the qualities of a geek to an extreme amount. Many ubergeeks display internet gaming and flash lingo in their daily speech. In a room full of geeks, the ubergeek stands out, often as the most irritating and socially inept person in attendence.
The ubergeeks in the corner quoted flashes and hummed the star wars theme so loudly that it greatly irritated the others in the room.