Green’s Dictionary of Slang

Warwick (Farm) n.

[rhy. sl.; ult. Warwick Farm, a Sydney racecourse]

(Aus.) an arm.

[Aus]Baker Aus. Lang.
[Aus]Smith’s Wkly (Sydney) 25 Dec. 6/2: [S]he flung her Warick Farms around me.
[Aus] ‘Whisper All Aussie Dict.’ in Kings Cross Whisper (Sydney) xliii 11/2: warwick farms: Arms.
[Aus]R. Aven-Bray Ridgey-Didge Oz Jack Lang 10: They were all wearing Mickey Mouse Gordon and Gotches on their Warwick Farms.
[Aus]J. Byrell (con. 1959) Up the Cross 9: ‘[H]e got holda one drop kick by the left warwick and yanked him into the whisper and stamped on his loaf with his right plate’’.
[Aus]R.G. Barratt ‘Plenty to Grumble About’ in What Do You Reckon (1997) [ebook] Then there are her armpits [...] if she’s not worried about fixing her lamington, she could at least do something about her Warwicks.
[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 200/2: Warwick Farm n. arm.
[Aus]Pete’s Aussie Sl. Home Page 🌐 Warwick Farm, Warwicks: the arm, arms, e.g. ‘whiffy under the Warwicks’=‘smelly under the arms.’.
[Aus]Sydney Morn. Herald 10 July 🌐 He met someone he knew who ‘took one look at me and within five minutes I had something [i.e. heroin] up the “Warwick Farm” and I could cope’.