Something that is an example of "G" behavior. Such as, but not limited to robbing, capping or smashing. "G" meaning gangsta.
1. This nigga be on some straight G-shit.
2. I'll blow your whole shit up on some g-shit nigga.
3. Fuck all y'all niggas, run up on you wit all my dogs, fuck you think this is nigga? You about to feel that dead-ass real G-shit.