Green’s Dictionary of Slang

1. urination [= slash n. (2a)].

1992

R. Puxley Cockney Rabbit.

2. (Aus.) hashish [= hash n.² ].

1989		R.G. Barrett Boys from Binjiwunyawunya 282: ‘It’s not bad Johnny this,’ she said, passing the joint.
1990		Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 Johnny Cash. 1. Hashish. Rhyming slang for hash.
2002		Pete’s Aussie Sl. Home Page 🌐 Johnny Cash: hash (hasheesh).

3. (Aus. prison) a hiding place [= stash n.¹ (5)].

1990

Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 Johnny Cash. 2. Hiding Place. Rhyming slang for ‘stash’.

4. (N.Z. prison) in non-rhy. sl. money, i.e. cash.

2001

D. Looser Boobslang [U. Canterbury D.Phil. thesis] 96/1: Johnny Cash n. money.