manly-warringahs, n. — Green’s Dictionary of Slang

manly-warringahs n.

[rhy. sl.; ult. Aus. Rules football club Manley Warringah; warringah, a term from the Guringai language means ‘sign of rain’, ‘across the waves’ or ‘sea’]

(Aus.) fingers.

1990		Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 Manly Warringah. Rhyming slang for finger.
1999		G. Seal Lingo 90: Some other examples: [...] manly-warringah’s for fingers (New South Wales version, a homage to a prominent local football club).
2004		R.G. Barrett Rosa Marie’s Baby (2013) [ebook] ‘See how Latte likes sucking on his lattes with a couple of Manly Warringahs missing’.