plunk a baby, v. — Green’s Dictionary of Slang

plunk a baby v.

[the Royal New Zealand Plunket Society, founded 1907, the N.Z. version of the UK Royal Society for the Protection of Women and Children; ult. Lady Plunket, wife of the then governor of N.Z., an early patron]

(Aus./N.Z.) to have a baby; thus get plunked v., to be pregnant.

1941		Baker Popular Dict. Aus. Sl.
1946		P.L. Soljak New Zealand, Pacific Pioneer 117: plunk a baby: to give an infant scientific care.
1988		McGill Dict. of Kiwi Sl. 49/2: get plunked get pregnant; by association with the Plunket Society, which looks after pregnant mums if required.
2003		McGill Reed Dict. of N.Z. Sl. 159: plunk a baby Give birth, a tribute to the Plunket Society’s dedication to all Kiwi newcomers. Variations are to get plunked, get trubied after Plunket founder Sir Truby King, and get karitanied after the founding place of the society outside Dunedin. To be plunked is to be pregnant. A plunket shield was a contraceptive sheath, playing on the name of the premier local cricket trophy.