Question: What Cantonese slang term with a history of racially deprecatory usage was also used as a reference in the title of a 2006 drama directed by Nick Broomfield?
Sentence (from "Ghosts (2006 film)"): The title is a reference to the Cantonese slang term "Gweilo" (鬼佬), meaning "ghost man", used for white people.
Relevant evidence: Yes