Green’s Dictionary of Slang

pig’s Christmas parcel! excl.

[rhy. sl. = pig’s arsehole n. (1)]

(N.Z.) a general excl. of annoyance.

‘F. Bruno’ Desert Daze 23: And did he marry poor blind Nell? He did — pig’s Christmas parcel. [Ibid.] 50: Minefield, pig’s Christmas parcel [DNZE].
[NZ]McGill Reed Dict. of N.Z. Sl. 157: pig’s Christmas parcel Arsehole.