A geek is a person who is socially excluded from a general population. Unlike
nerds, geeks do not necessarily have to be smart. They often create groups among themselves, and generally have these similar characterizations:
-lack of participation in physical activities, such as sports
-an interest in computer
-a crude sense of humor radically different from common society
-a negative attitude toward common society.
Bill Gates was probably a geek in high school, and probably still is today.