Green’s Dictionary of Slang

slipper n.¹

(Aus.) a kicking.

1967		‘Whisper All Aussie Dict.’ in Kings Cross Whisper (Sydney) xl 4/4: slipper: A kicking. Very popular among the younger generation.
1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 45: Slipper A kicking.

In phrases

put in the slipper (v.) (also lay in the slipper)

(Aus., orig. prison) to give a kicking.

1956		J. Curtis Look Long Upon a Monkey 84: Here was one of Ray’s enemies, a lahdidah, jumped up, snotty-nosed cowson, defenceless. Good enough! Smashing chance to put in the slipper.
1999		P. Temple Black Tide (2012) [ebook] Wes slaps him a few, knocks him, down, gives him a bit of grace with the slipper.
2001		(con. 1945–6) P. Doyle Devil’s Jump (2008) 169: I laid in the slipper with all the force I could muster.