Nerd [nɚd] is a term often bearing a derogatory connotation or stereotype, that refers to a person who passionately pursues intellectual activities, esoteric knowledge, or other obscure interests rather than engaging in more social or popular activities. Therefore, a nerd is often excluded from physical activity and considered aloner by peers, or will tend to associate with like-minded people.
The word geek is a slang term, noting individuals as "a peculiar or otherwise odd person, especially one who is perceived to be overly obsessed with one or more things including those of intellectuality, electronics, etc."Formerly, the term referred to a carnival performer often billed as a wild man whose act usually includes biting the head off a live chicken, bat, snake or bugs. The 1976 edition of the American Heritage Dictionary included only the definition regarding geek shows.