"Newbie" can be used as a term to identify newcomers to a game, place, or organization. Just the opening definition The variant spellings of "newbie" are also used, especially in online games, as a catch-all insult regardless of the recipient's actual skill or experience. Someone who acts like a "newbie," but isn't one would be referred to as one of the variant spellings. The variant "noob" has become common in spoken English by juveniles. Introduction of "noob" Alternate spellings include "newb", "n00b", "noob", "nooblet", "nub", and the recently popular "nublet." These alternate spellings of the term, other than "newb," inherit the definition of "newbie" but are generally used in a derogatory manner to indicate uselessness because of the ignorance associated with being a newcomer. Used in a derogatory manner. There you go.
In online games, mainly MMORPGs such as World of Warcraft or Lineage 2, a greater distinction may be made between a "newb" and a "noob." The common consensus is that a "newb" is someone who through their very nature of being a new player is inexperienced and naive to particular gaming mechanics or etiquette, whereas a "noob" is a player that is generally considered to be experienced, yet often makes mistakes or solecisms that would more likely be attributed to a "newb." Noobs are players who should be good but suck anyways The term "noob" can also be applied to someone who is experienced, but blatantly disregards rules and etiquette.