Green’s Dictionary of Slang

(Aus./Irish) a breaking of wind.

2002		Blue Pages (Dublin) ‘Dublin Dictionary’ 🌐 Apple tart – Fart – sorry but there’s no nice way to say it.
2002		Pete’s Aussie Sl. Home Page 🌐 apple tart: a fart (he apple tarted).
2003		B. Dark Dirty Cockney Rhy. Sl. 17: Have you dropped an apple tart or has a rat died up your Khyber pass? [Ibid.] 74: lemon tart fart.
2009		G. Seal Dog’s Eye and Dead Horse n.p.: It’s [...] wonderfully cheeky to remark ‘Who made the apple tart?’ instead of ‘Who made a fart?’.