Green’s Dictionary of Slang

(Aus.) the wine chardonnay. Joc. mispron., supposedly based on a faulty understanding of French orthography [see cites].

2003		Ridley & Turner That’s Unusual 115: Kim: I’m still waiting for my cardonnay. Kelly: I think you mean chardonnay. Kim: No, Kelly, it’s French. The ‘h’ is silent.
2006		Qenny’s Virtual Gob 15 May [Internet/blog] Hello to a fellow Kath & Kim fan - but what a simple mistake... the drink is called Cardonnay, not Chardonnay. The ‘h’ is silent, you shunt! ;-).
2008		Jessica White [Internet/blog] Seeing as it seems to be the done thing to sit outside in the sun to blog and drink cardonnay* these days, I have set myself up in the garden to write. [footnote: After watching Kath and Kim, I am now incapable of saying chardonnay. It must be pronounced, as Kim vehemently protests, without the ‘h’: ‘It’s cardonnay, cardonnay, ya pack of shunts!’].
2016		RealEstate.com.au 7 Dec. 🌐 It was snapped up by a buyer from Bentleigh, who will no doubt be celebrating with a glass of cardonnay.
2020		TVNZ 30 Jan. 🌐 Grab a glass of ‘cardonnay’ and have a sticky date with these two bonza babes!