Hong Kong term for (white) Westerners.
It means
something like "ghost", "ghost man" in Cantonese.
Not really an insult, sort of
funny, almost endearing.
Can be an insult when used with "sei": "sei gweilo", means "damned foreigner"
Also spelled as gweilo or gwailo.
A western woman is called "kweipo" (or gweipo/gwaipo).
"Bring this kwailo some fried
rice, he does not like real Cantonese food."
From a Sydney
Chinese restaurant review:
"The yum cha is really kwailo but good. Tasty
fresh and well priced (for kwailo)."