The title of the Ghosts film is a reference to what Cantonese slang term that is used in Cantonese to refer to Westerners, and applies to European ethnicities in its unmodified form.
Ghosts (2006 film): Ghosts is a 2006 drama film directed by Nick Broomfield, based on the 2004 Morecambe Bay cockling disaster. Gweilo:  In its unmodified form, it applies only to European ethnicities and has a history of racially deprecatory use. Gweilo:  Cantonese speakers frequently use "gwailou" to refer to Westerners in general use, in a non-derogatory context, although whether this type of usage is offensive is disputed by both Cantonese and Westerners alike.
i don't know