she's a bit of a nerd

[smartie_Warsaw]

Hi,

I've got a problem understanding this idiom. Could you please explain to me what it means?

Regards,
Kamila

 

[Anglika]

A nerd is someone who is a person who lacks social skills or is boringly studious. A person who is intensely interested in a particular hobby or topic.

It is not a polite way of referring to someone.