Don't Be Mad At Me Real Rap People, I Consider Myself to be too but sometimes we all stumble???

I'm stumbling on some Lyric meanings unfortunately it happens to be arguably the greatest rapper and one of the songs is one of the greatest Calabo's of All-Time too. "Roc Boys" What Does Jay mean when he says Heroin got less steps then Brittney, means it ain't stepped on didn't he" when I stumble its mostly somethin real simple I think too deep sometime. My second is "Brooklyn's Finest" and the 2 pacs line, I kno the Rapper of course but I didn't really get it... Yes It Saddens Me to Say it, Help