It means that you don't know how to play. Or not good in any game
Hey you eliminated you are such a noob
this is when your really bad at the game, you are actually the worst, LITERALLY
get gud m8
he died because he threw a bomb at himself, what a noob.
i'm sure you've hears it, ya know on roblox, ryhms with boob, scoop, POOP. it just means new at an activity like a game or something.
guy: hey look he has never played before he SUCKS!
guy 2: yea he's such a NOOB
Your little brother
If you are bad at something you are a little brother or a noob