Green’s Dictionary of Slang

lor blime! excl.

(Aus.) a mild excl., lit. ‘Lord blind me!’.

1897		Barrier Miner (Broken Hill, NSW) 27 May3/1: ‘You’ve learnt some Australian slang, too!’ [...] ‘I know “fair dinkum,” “lor blime,” and a few other bits.
1912		Bulletin (Sydney) 26 Sept. 15/1: A quarter parst, ’n’ ’im not come? / Lor blime, this is pretty stiff.
1918		C.J. Dennis ‘A Guide for Poits’ in Backblock Ballads 38: Lor’ blim’me! I ain’t married to me Muse!
1923		P. MacGill Moleskin Joe 286: And lorblimey! the way that his head was cracked again the rocks is somethin’ awful.

In derivatives

lor-blimer (n.)

(Aus.) a vulgar, vociferous person.

1912

Bulletin (Sydney) 26 Sept. 5/2: But some are nonentities stylishly drest, / Looking down on mere common lor-blimers, / And some, like the fat, heavy dame, are the Best, / And the ones she dislikes are the climbers.