Green’s Dictionary of Slang

kehua n.

[Māori kehua, a ghost]

(N.Z. prison) a white person.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 98/2: kehua n. a Pakehii. [from Māori kehua =. ‘ghost’; after a Pākehā’s pale appearance.