Green’s Dictionary of Slang

(Aus.) naked.

1967		‘Whisper All Aussie Dict.’ in Kings Cross Whisper (Sydney) xxxii 7/1: bollicky: To be in the bollicky is to be completely nude.
1971		F.J. Hardy Outcasts of Foolgarah (1975) 23: He had turned the shower off and came out bollicky.
1971		Ribald (Sydney) 140 5: Next door neighbours out at Rooty Hill, the Slocombs and the Pokehams, pose in the bollocky [Simes:DLSS].
1991		K. Lette Llama Parlour 202: He was completely naked. Starkers. In the bollocky.
2000		K. Smith Run Naked, Run Free 116: ‘You wash together. All bollocky-buff and stuff?’ excited Matt [Simes:DLSS].