1. What does it mean?
Borrowed from English 'newbie,' 뉴비 refers to somebody who has recently started an activity or joined a group. It often highlights unfamiliarity with the local rules, terminology, or tools.
Also written or said as newbie, nyubi
2. The nuance
It can be a neutral self-description or a friendly label, but can also sound condescending when used to dismiss somebody. Being new to one community says nothing about their ability in general.
3. Examples
“이 게임 뉴비인데 장비는 어디서 바꾸나요?”
I'm new to this game. Where do I change my equipment?
“우리 모임은 뉴비도 부담 없이 질문할 수 있어.”
Newcomers can ask questions freely in our group.
Sources
Nate News: Korean usage in the press
References support the meaning and usage. Example sentences are written for NoCapWiki.