A Caucasian or a white person.

The term is regarded by many non-chinese as a racist derogatory term used increasingly as a racial slur to describe Caucasians in Singapore and Malaysia

red hair literally. refers to caucasians.

the original term is 'ang moh gui', meaning a caucasian devil. 'ang moh gui' is used by ppl in 'nanyang' decades ago. most probably referring to colonial masters, who were mostly britons.

now, the 'gui'is dropped and juz means caucasian. no hatred involved.

Hokkien for red hair. Used in reference to caucasians because they are the only race capable of being born with natural red hair.