What does the rapper Game mean by this?

In the older song "Hate it or Love it" The Game raps in his first verse "Believe you me homie, I know all about losses. I'm from Compton where the wrong colors be cautious, one phone call have your body dumped in Marcy". What exactly is "Marcy"? Is it a section of Compton? an area? a bad playground? I'm just curious. I'm fromn PA so I have no idea of what he's talking about. Thanks