Green’s Dictionary of Slang

1. (N.Z.) a British immigrant to N.Z. who arrived on the TSS Captain Cook in the 1950s.

2003

McGill Reed Dict. of N.Z. Sl. 42: Cookers were the British immigrants who came here aboard the TSS Captain Cook in the 1950s, as part of a total of 27,000 British migrants.

2. see Captain Cook n. (1)