takie coś znalazłam:
"Unlike the word "nerd," which is always pejorative, "geek" often carries a positive connotation when used by one of the group. The use of the term by outsiders is considered insulting."
"[Nerd-] Often mistaken for Geeks, who aspire to become nerds, yet lack the intelligence, and end up giving nerds a bad name due to their poor social skills."
source: www.urbandictionary.com