In the late 1950s, Leopoldville (now Kinshasa, in the DR Congo¹) got its first movie theaters. The rate of unemployment was high at the time, so the mostly uneducated youth of the city spent a lot of their time watching Westerns. This grew into a sort of obsession, and eventually gangs were formed based on the culture in the films. These kids were collectively called The Bills. They wore cowboy outfits, developed their own dialect---Hindubill—and named their territories based on locations in America and movies they’d seen (like “Texas” and “Godzilla”).

The Wikipedia article has a little more information.