Nub*core; n. 1. A player that is so newb he has surpassed the level of newb, noob, and nub. 2. A nub so godly at being nub that it's nubcore. 3. Extreme, undescribable nub. 4. Stephen Dale.
Mary pwned Steve with an SCV, when steve had 24 Battlecruisers on LT. (Didn't know how to attack) Mary says "YOU FUCKEN NUBCORE NOOB!!!!!!!! YOU SUCK!!!"