The word geek is a slang term originally used to describe eccentric or non-mainstream people , with different connotations ranging from an expert or enthusiast to a person heavily interested in a hobby , with a general pejorative meaning of a peculiar or otherwise dislikable person , esp ( ecially ) one who is perceived to be overly intellectual .
One dictionary says that a geek is `` a peculiar or otherwise dislikable person , especially one who is perceived to be overly intellectual '' .