Geekotist

Conjunction of Geek + Egotist = Geekotist. A sci-if, fantasy, comic book know-it-all. A braggart who can't help but judge those who haven't risen to their level of geekdom.

Adj. Geekotistical

"I can't believe you don't know who directed Episode 27 of Star Trek Next Gen!" Sneered the geekotist.

"I'm not some kind of geekotist who can identify the obscure villain in the teaser clip after the credits in that X-Men movie!"