Green’s Dictionary of Slang

Balmain folk dancing n.

(Aus.) kicking a prone victim; ‘putting the boot in’ .

[Aus]R.G. Barrett You Wouldn’t Be Dead for Quids (1989) 110: Murray kept doing a bit of Balmain folk dancing up and down his ribcage with his R.M. Williams riding boots.
[Aus]R.G. Barrett Mud Crab Boogie (2013) [ebook] [T]he Crabettes swarmed in again and gave the crowd probably the best display of Balmain folk dancing they’d ever seen. With tigerish ferocity the girls just about kicked the five blokes’ heads almost off their shoulders.
[Aus]R.G. Barrett Leaving Bondi (2013) [ebook] Les looked at the two young hoods [...] and felt like doing a bit of Balmain folk dancing on their heads.