Descriptor of a guy you are not interested in, even though there is nothing glaringly wrong with him. Can be used to introduce a variety of usually minor flaws or reasons that said guy is not "it". Not overly critical, but is final dismissive.
Q: "So, how'd it go withJason last night?"
A: "It was okay, not great - NGB."
NGB = No Game Breaks.
The act of not taking a break from spittin' game. It is often a good thing to not take a game break, because if you do, it means that you have no game.