noob

or n00b

[noob]
noun Slang: Usually Disparaging.
  1. a newbie, especially a person who is new to an online community and whose online participation and interactions display a lack of skill or knowledge: Some games and gaming forums are crawling with annoying noobs.

Origin of noob

shortening and alteration of newbie
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for noob

noob

noun
  1. slang another word for newbie Also written: n00b
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for noob
n.

c.2000 in gamer slang, variant of newbie; often used interchangeably with it, but also often with a more derogatory shade of meaning; newbies owe their clueless behavior to lack of experience and can improve, while the fundamental characteristic of noobs is incorrigible obnoxiousness or stupidity.

Online Etymology Dictionary, © 2010 Douglas Harper