Green’s Dictionary of Slang

(Aus./N.Z.) partially, vaguely.

1982		G. Newbold Big Huey 179: I’d half-pie suspected Jock because he’d been hanging around me a bit lately.
2000		N.Z. Herald 23 Aug. 🌐 The country cannot afford fighters and a third frigate and should do one thing well rather than three things half-pie.
2000		R.G. Barrett Leaving Bondi (2013) [ebook] Knox was half pie pally with the old girl.