The God-Emperor of Mankind is not a wizard o_o
noob = newb
dif spelling
well my theory would make sense, some dude was probably playing a game and was pissed off and said:
guy a:"OH YOU NOOBS!"
guy b:"Lul what is that?"
guy a:"Lol it wus a typo, lol im so cool"
Also if you look at your keyboard the b key is right next the n key right?