A light-hearted variation of the word noob. Not to be confused with; noob, n00b or newb. This is a word used to best described a person who is not fully a noob, but is prone to making stupid mistakes. Can also be used as a way to condescend a weak player in a competitive game.
nub: "Dammit dude, i was making this sickass map in minecraft, and i accidentally closed it out..."
otherguy: "lol nub."
nub: "LoL dude, I almost killed you there. You so got me!"
pwnr: "... -.-. whatever nub, just fuckin play and stfu"