Green’s Dictionary of Slang

(N.Z.) arranged, sorted out, ‘fixed’.

1962		Dominion (Wellington) 9 Nov. 6: Full on Jacks. This has been jacked-up question week in the House. This old, simple device deceives no one [...] The method is for a Government member to ask a Minister a question, the reply to which will embarrass the Opposition [DNZE].
1973		P. Wilson N.Z. Jack 107: She’s going to marry me. Everything’s jacked up.
1982		H. Beaton Outside In I ii: It’s all jacked up.