Green’s Dictionary of Slang

(Aus.) tiny pieces, shreds; esp. in the phr. kick someone to/knock someone into jim-rags.

1894		H. Lawson Short Stories 65: If yer starts playin’ any of yer jumpt-up pranktical jokes on me ... I’ll kick yer to jim-rags, so I will!
1899		Aus. Mag. (Sydney) Apr. 7 7: Me and you ain’t goin’ to fight, Andy... If you try it on I’ll knock you into jim-rags!