nerd

3 definitions • 3 examples

a person, especially a man, who is not attractive and is awkward or socially embarrassing:

He was a real nerd in high school - I can't believe he's so handsome now.

a person who is extremely interested in one subject, especially computers, and knows a lot of facts about it:

I'm a real grammar nerd.

a person who lacks social skills, esp. someone interested in technical things:

Gina’s brother is a complete nerd.