Pronunciation : \ˈgēk\
Function: noun

Geeks are pretty much people who have a real understanding for a certain topic eg Films, music, cars. It’s usualy that they are totaly obsessed about the topic, or it’s just something they think a lot on ; an outwardly normal person who has taken the time to learn technical skills. Geeks have as normal a social life as anyone, and usually the only way to tell if someone is a geek is if they inform you of their skills. (urbandic)

A person often of an intellectual bent who is disliked (merriam-webster)

Any person considered to be different from others in a negative or bizarre way, as a teenager seen as being socially or physically awkward (yourdictionary)