a person who is knowledgeable about and obsessively interested in a particular subject, especially one that is technical or of specialist or niche interest

a computer geek

Jim is an unashamed tech geek

I'm a bit of a geek when it comes to historical events

an unfashionable person who lacks social skills or is boringly studious

geeks who chose to study boring courses

a performer at a carnival or circus whose show consisted of bizarre or grotesque acts

engage in or discuss technical or computer-related tasks obsessively or with great attention to detail

we all geeked out for a bit and exchanged ICQ/MSN/AOL/website information

keep it simple or geek out and create multiple playlists on the move

a look

there was a lot I wanted to have a geek at