So lets look at this from mojangs prosective noob meaning novice or new to what ever one is doing has been used by video games as a way of making fun of other players who are not good at one thing that they are.  Now having covered that up first off noobs are good for all of us in minecraft provideing money for mojang and inturn keeping minecraft open and growing our comunity so if you dont like noobs think about that befor you type N0ob as a insault in chat