What do noob mean?
If you are a noob at something you are new at it.
slang/short for newbie
Means you don't know what you're doing
noob is a slang term for a new player of a game, who doesn't know much about the game, or isn't good at the game. It's commonly used in games such as Minecraft, Halo, and Runescape.
If you suck at a game, you're a noob. If you watch Pure Pwnage, you will understand the real meaning of noob.