nerd

1. a single-minded person obsessed with a hobby or pursuit or with a particular topic:

   My 13-year-old son is a computer nerd.

   I joined a book club and discovered another Jane Austen nerd.

2. a person considered to be socially awkward, boring, unstylish, etc.

1. to spend inordinate amounts of time, attention, energy, enthusiasm, etc., on an activity or topic of special interest to oneself; geek:

   I enjoy samurai movies, nerding about samurai movies, and the occasional slice of cake.

   Don't cross the street while you're nerding on your phone—you're likely to get hit!

verb phrase

1. to engage with excessive enthusiasm in a hobby or in discussion about a topic of special interest to oneself:

   Back in the day, I nerded out hardcore over baseball cards.

   We sat there for half an hour while she nerded out on the metaphysical poets.

2. to alter or be altered in a way that shows excessive enthusiasm for a special interest:

   He appears in that film nerded up as a philosophy genius.

   I'm going to nerd up my office with these five Charlie Chaplin posters.

   Wow, this simple conversation about cheese sure nerded up fast!