Green’s Dictionary of Slang

1. (orig. Aus.) an eye, usu. in pl.

1915		Sun. Times (Perth) 5 Sept. 8: Keep your meat-pies on that peanut, I think he’s on fer crackin’ up ther crib.
1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 13: She sits by a flickering Ron Randell in sweet celestial bliss / She sits there with meat pies like pools of hit and miss.
1992		R.G. Barrett White Shoes 15: Keep your meat pies open. There’s a lot of shifty cunts up there.
1995		J. Cameron Vinnie Got Blown Away 150: He closed his meat pies in respect for Senegal.

2. a necktie.

1965		Aus. Women’s Wkly 3 Nov. 10/4: You never move your bag of fruit (suit) and meat pie (tie) to the big peach (beach).
1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 36: Meat Pies Neck ties.

3. a fly (the insect or that of the trousers).

1992

R. Puxley Cockney Rabbit.

4. a lie.

1993

T. Pratchett Men at Arms (1994) 175: Someone is telling meat pies. Never trust anyone who falls on their arse for a living.

5. (Aus.) a (rugby) try.

2016

N. Cummins Adventures of the Honey Badger [ebook] Meat pie = try.