Green’s Dictionary of Slang

half-pie adv.

[half-pie adj.]

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

[NZ]G. Newbold Big Huey 179: I’d half-pie suspected Jock because he’d been hanging around me a bit lately.
[NZ]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.
[Aus]R.G. Barrett Leaving Bondi (2013) [ebook] Knox was half pie pally with the old girl.