What is The Brown Market?
1.
Like the Black Market, only all the illegal items you will ever need come from your fellow inmate's asshole. Hence, brown.
Guard Falzone: Listen, just tell us where you got the melon baller.
Prisoner: (sigh) Jerry's asshole.
Guard Falzone: You mean...?
Prisoner: Yup, The Brown Market.
See
2.
Anything you would get black market such as copyrighted material or illegal narcotics except from a Latino, hence BROWN market.
Steve: Where did you get that polo shirt at bro?
Bro: I got it real cheap from the Brown Market
See