Your Momma took to shouting
Your Poppa's gone to war,
Your sister's in the streets
Your brother's in the bar.
The thirteens. Right On.
Your cousin's taking smack
Your Uncle's in the joint,
Your buddy's in the gutter
Shooting for his point
The thirteens. Right on.
And you, you make me sorry
You out here by yourself,
This could have two different meanings. In the metaphorical sense, he could mean the person is trying to get what they want/need in life but can’t obtain. In the actual sense, this could mean he is killing people to make his point in his life. 

The Thirteens Black