Noob is in da hood. Means that a noob has entered the service. Can be used by the noob himself as a message to others that he or she need guidance. Paradoxally, noobs don't usually use the word. Why? Because they are noobs. More often used by someone else watching the noob, said for example after the noob has failed in something.
Nick: "W00000t!!!111 I accidentally destroyed myself in tis game!!1
Rick: "Code 542."