nerd means a person very dedicated to studies, who performs intellectual activities that are often inappropriate for his age.
often the nerd forget about pleasurable social activities, such as participating with friends in a football match, meeting with a group “to make small talk” among other activities.
This term is used a lot in a derogatory and playful. The said, nerd, is often a loner who is dedicated to a hobby antisocial, and may have difficulties in integrating with a group, because he is usually also quite shy.
In less frequent cases, the word nerd is used as slang to describe a person who is irritating, unpopular, or physically unattractive.
Many movies or cartoons have divulged the stereotyped figure of the nerd that usually doesn't correspond to the whole reality. The Nerds' Revenge with Robert Carradine is an example, among other films and television series.
nerd is derived from an expression used in the 1950s for representatives of a Research and Development Department at Nortel, a company of electricity from Canada, and was designed for those researchers who worked in the technology lab, and who spent sleepless nights doing their researches. In the 1960s this term began to be used referring mainly to physicists and intellectuals.
There is also the geek which is called technonerd, but they differ from the nerd because their main interest is technology, science and information technology. In Brazil, the most used term is CDF which means “iron head” for very intelligent and dedicated people.
Pride Day nerd is celebrated on May 25th since 2006.