Heroin has to be the ultimate, the mother of all drug songs.

Another great one I listened to today on Superfly- Curtis Mayfield- Pusherman

I'm your mamma, I'm your daddy
I'm that nigga in the alley
I'm your doctor, when in need
want some coke, have some weed
you know me, i'm your friend
your man boy, thick and thin
I'm your pusherman
I'm your pusherman