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1.
It's a newly form of "Noob" People like to say Nub instead of Noob and it basically means the same but when people get mad in a video game and try to say nub sometimes they write nubn...

N.U.B non-useful body (also as an idiot/player)
Oh my gawd i was out of ammo and i still killed you even though you had the machinegun on my face! What a Nubn...

It's Nub...

Whatever..
by Enfuze June 11, 2010