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slang A person who is new to something, especially a competitive activity. I'm starting to really enjoy playing online multiplayer in certain video games, even though I'm still a total newbie and get my butt kicked. Who let all these newbies join our team? We're going to get trounced! The pace is only going to pick up from here, newbie, so if you can't stand the heat, get out of the kitchen.
n. someone who is new to a group, place, activity, etc. (The opposite of oldbie.) I’m just a newbie, but I do have a question for the group. Will you noobs ever learn to read the FAQ?