Green’s Dictionary of Slang

(Aus.) a left-hander.

1977		J. Ramsay Cop It Sweet! 20: CACKY-HANDER: Left handed person.
1988		Sydney Morn. Herald 22 Dec. 40/4: A wristy lad he could be Pakistan's first outstanding cack-hander since Sadiq Mohammed. For some reason left-handers are rare in the Orient.
1993		Times (Victoria Habor, SA) 4 Dec 31/5: Being a left handed golfer is a curse many players have to bear, as the game was simply not developed for these ‘cack handers’.
2010		Sydney Morn. Herald 14 Aug. 20/8: ‘I’d give my left arm to be ambidextrous’ - should end the current kacky hander topic.