Green’s Dictionary of Slang

no worries (mate) phr.

also no troubs, no worries on me, no wuckin’ furries

(orig. Aus.) a common phr. of assurance; usu. ext. by she’ll be all right.

[[Aus]N. Shute In the Wet 256: I’ll be right. I’ve got a straight job with no worries, nothing to lose sleep over].
[Aus]B. Humphries Barry McKenzie [comic strip] in Complete Barry McKenzie (1988) 32: No worries — I’ll meet you at the customs.
[Aus]Lette & Carey Puberty Blues 90: ‘Look after them’, he said to Garry. Garry nearly dropped dead. ‘No worries.’.
[Aus]A. Weller Day of the Dog 110: I’ll be sweet. No worries on me, honey.
[Aus]Aus. Women’s Wkly 2 Sept. n.p.: He isn’t wearing a tie. ‘No worries, mate’ he says, grinning.
[UK]J. Cameron Vinnie Got Blown Away 171: One of them hit Canning Town up the throat on a karate, likely broke his neck. No worries.
[Aus](con. 1964-65) B. Thorpe Sex and Thugs and Rock ’n’ Roll 11: ‘Her bracens ’ve got a hard-on for you, my son, no wuckin’ furries. I got the drum’.
[Aus]J. Birmingham Tasmanian Babes Fiasco (1998) 132: ‘No wuckin’ furries,’ he said.
[NZ]McGill Reed Dict. of N.Z. Sl. 143: no troubs/worries Reassuring remark. ‘No worries, mate, we’ll make it.’ ANZ later C20.
[Aus]R.G. Barrett Rosa Marie’s Baby (2013) [ebook] ‘No wuckin furries’.
[UK]Guardian Society 13 July 🌐 Spent 50 grand in a day no worries.
[Aus]D. McDonald Luck in the Greater West (2008) 128: Stay outa fuckin’ trouble, hey boys. – No worries, mate.
[UK]J.J. Connolly Viva La Madness 389: I can get it; no worries.