Green’s Dictionary of Slang

(N.Z./UK) tired; depressed; irritating.

1896		Regiment 18 July 242: [cartoon caption] He mused ‘’Twould be joy / To spank this small boy— : / I’ll be jagged if I don’t,’ and he did.
1988		McGill Dict. of Kiwi Sl. 62/2: jagged tired in trampers’ terminology; also depressed or irritating.
2003		McGill Reed Dict. of N.Z. Sl. [as cit. 1988].