Green’s Dictionary of Slang

(Aus.) money; thus big bikkies, a large amount of money.

1967		‘Whisper All Aussie Dict.’ in Kings Cross Whisper (Sydney) xxxii 6/1: bikkies: Money.
1974		D. Ireland Burn 59: He didn’t come across [...] and there I was, minus my bikkies.
1978		Age (Melbourne) 13 Apr. 50/5: [advert] Some of our popular models [...] could be worth big bikkies — either as a tarde-in or a cash buy.
1985		B. Humphries Traveller’s Tool 90: I played an ultra-modest role in a sequence of events that led to most of the above-mentioned stars cracking it for big bikkies in Easy Street, Fat City.
1988		McGill Dict. of Kiwi Sl. 14/2: bikkies money; usually ‘big bikkies’, a lot of money.
1992		A. Duff One Night Out Stealing 105: Not to mention the big bikkies. Very big.
2003		McGill Reed Dict. of N.Z. Sl. [as cit. 1988].
2005		D. Gutman The Get Rich Quick Club 45: ‘Big Bikkies say that again!’ Rob said excitedly. So I said it again: ‘You think you’re going to get rich quick washing cars?’.
2007		S. Maloney Sucked In 165: More than thirty grand all up [...] Big bikkies in those days.