Definition of mutton-bird scrub in English:

mutton-bird scrub

Pronunciation /ˌmʌt(ə)nbəːd ˈskrʌb/

noun

New Zealand
  • Any of various shrubs or small trees of the family Asteraceae (Compositae), found in coastal areas of southernmost New Zealand, which have leathery leaves densely hairy underneath; especially Brachyglottis rotundifolia (Senecio reinoldii), or (less frequently) any of several kinds of daisy bush, Olearia spp., especially O. colensoi.

Origin

Late 19th century; earliest use found in Zealandia. From mutton-bird + scrub.