The borough of southwark england, called this because it has black trashcans. Known as a "gangsta" area because of places such as camberwell, walworth (woolyhood, gaza strip Glock 17 etc.) and and most notably peckham because of their rivalry with the ghetto boys and brixton in general.
Lively place though and great place to buy weed (Especially from guys out of the walworth area)
Boy1: Blud where u about to go?
Boy2: bout to go see my mans in black borough"
Boy1: make sure u bring ur gat and pick me up a eigth aight blud?