also see noob.
n00b is the advanced version of noob.
1) refers to one who does not know what n00b or noob means.
2) also refers to someone who searches on urbandictionary.com to find out what n00b means.
kid 1: What does n00b mean?
kid 2: It means you are a n00b.
Player 2: "What is it with those new players anyway!? No respect!"
Player 1: "Not a newb, they're understandable, n00bs just have problems!"
Variant spellings, such as newb, nub, noob, nooblet, foob, noobcake and, in Leetspeak, n00b are numerous and common in Internet use. The term newb itself is usually used to refer to a person who is new to the field in question, whereas noob is used as an insult. For example, in the internet show "Pure Pwnage," the main character regularly says, "I pwn noobs," in this case, meaning he beats people of lower skill than himself.
good gamer:"omg that guy is such a n00b, lets go pwn him."