Green’s Dictionary of Slang

jaffa n.

[the size of a Jaffa orange]

1. (UK juv.) a male who has notably large testicles.

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OnLine Dict. of Playground Sl. 🌐 jaffa n. [...] A person with enormous bollocks.

2. (N.Z. prison) a white person who identifies as a M?ori.

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[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 94/2: jaffa n. a P?keh? who identifies as a M?ori.