Green’s Dictionary of Slang

(Aus./N.Z.) to depress, to irritate.

1898		A.J. Boyd Shellback 345: The men declared that the first officer who laid a hand on them or ‘jagged’ them would be shot, or ‘spilled in the drink’.
1904		‘G.B. Lancaster’ Sons O’ Men 43: It’s the beastly silence jags me.
1908		K. McGaffey Sorrows of a Show Girl Ch. xiii: Sabrina you certainly do jag my jib to think that you would enter into such a deal.