Noob
/nuːb/ · Noun · Slang & Abbreviations
Definitions
A newcomer or beginner, especially one who is unskilled or unaware of basic conventions. Spelled variously as noob, n00b, newb, or newbie. The distinction matters: a 'newbie' is sympathetically new; a 'noob' makes mistakes a newbie wouldn't.
In plain English: An inexperienced person — can be affectionate or insulting depending on tone. Everyone was one once.