Ghosts is a film with the title referencing to a slang term for what?
Ghosts (2006 film):  The title is a reference to the Cantonese slang term "Gweilo" (鬼佬), meaning "ghost man", used for white people. Gweilo: Gweilo or gwailou (, pronounced ] ) is a common Cantonese slang term for Westerners.
Westerners