'Course Wednesday is nearly over or already so for those on the other side of the globe, but fun nonetheless.  So, what are you?  (Courtesy of my favorite Mac head :-)

Geek:
A person intensely interested in a particular field or hobby, generally at the expense of broader social interaction.

Dweeb:
A boring, studious, or socially inept person.

Spaz: (USA only!!!)
A stupid person.

Nerd:
A generally intelligent person who shows interest and aptitude in multiple, usually academic-related subjects (as opposed to geeks, who are only interested in one such subject). This definition is independent of social skills (i.e. Nerds are usually, though not necessarily, dorks).

Dork:
A quirky, silly and/or stupid, socially inept person, or one who is out of touch with contemporary trends. Often confused with nerd and geek, but does not imply the same intelligence level. (Napoleon Dynamite is a classic example.)

I think I am a geek by association with flashes of nerd and a dash of spaz, especially early in the AM. :-P