These are the dictionary definitions for the word 'geek'.
1. a digital-technology expert or enthusiast (a term of pride as self-reference, but often used disparagingly by others).
2. a person who has excessive enthusiasm for and some expertise about a specialized subject or activity: a foreign-film geek.
3. a peculiar person, especially one who is perceived to be overly intellectual, unfashionable, or socially awkward.
4. a carnival performer who performs sensationally morbid or disgusting acts, as biting off the head of a live chicken.
I fall heavily into the second definition. My very presence in the MFU community is testament to that. The geek within me was awakened at the age of 5. My uncle (an actual one) took me and my cousin to see 'Star Wars - The Empire Strikes Back'. From the moment the Star Destroyer came onto the screen, sci-fi became my passion.
Geeks generally are thought to be sci-fi fans or computer enthusiasts. In reality, anyone with an obsession is a geek.