Green’s Dictionary of Slang

matagouri n.

[‘rhyming slang; from the Anglicised form of tumatakuru, a thorny shrub also known as (wild) Irishman’ Looser (2001)]

(N.Z. prison) a M?ori.

2001

D. Looser Boobslang [U. Canterbury D.Phil. thesis] 115/1: matagouri n. a M?ori.