Green’s Dictionary of Slang

hockey stick n.

(N.Z.) a mutton chop.

[NZ]W. Brownlee postcard (Marlborough) in DNZE (1998) 350/2: Used by Nelson College Boarders for mutton chops.
[NZ]B. Stronach Musterer on Molesworth 4: Warty fed us again, chops and more chops. He called them ‘hockey-sticks’.
[NZ]D. McLeod Mountain World 310: Hockey Sticks: Musterers’ name for mutton chops.
[NZ]McGill Dict. of Kiwi Sl.
[NZ]McGill Reed Dict. of N.Z. Sl. [as cit. 1988].