Green’s Dictionary of Slang

a homosexual.

1974		Adamson & Hanford Zimmer’s Essay 41: ‘Thought you were a kiwi.’ [...] Oh yeah, the kiwi kid, never saw him before, just a camp sort of kid.
2000		Indep. 8 Jan. 5: Senor Beckham – he’s a kiwi, isn’t he? You understand what I’m saying. He’s a bit of a soft fruit: likes other men and all that.