Green’s Dictionary of Slang

cabbage patch n.2

[the size of such a patch in one’s garden and the commonness of the vegetable]

1. (US) a thing or place of little importance.

[UK]J. Buchan Greenmantle (1930) 306: Well, I get early noos of what is going on in this cabbage-patch. Likewise I get authentic noos of the rest of Europe.

2. (N.Z. prison) a child conceived by a woman when her partner is in prison.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 36/1: cabbage patch kid n. a child conceived while his father is in prison.