Green’s Dictionary of Slang

(N.Z.) any nameless small object, typically some form of gadget; thus doodackied up, dressed up.

1947		H. Walsh Fourth Point of Star 12: Anyway...Matron must have seen John waiting here, all doodackied up to meet his girlfriend [DNZE].
1988		McGill Dict. Kiwi Sl. 38/2: doodackie thingummybob, or humorous word for something you have no name for; a local variation of doodad, doodah, dooflickey, etc.
2003		McGill Reed Dict. of N.Z. Sl. [as cit. 1988].