Green’s Dictionary of Slang

shitcan n.1

[shit n. (1a) + SE can]

1. a lavatory, a commode; also fig.

[Aus]D. Martin Hero of Too 311: He wouldn’t mind seeing him hoist a big shit-can.
[Aus]R.G. Barrett Boys from Binjiwunyawunya 278: What happened to your bloody head? [...] It looks like a kicked-in shitcan.
Sydney Morn, Herald 7 Aug. 143/1: ‘There’s the potential for a shitcan to be tipped over me with this book’.
[Aus]Sydney Morn. Herald Good Weekend 24 Nov. 31/3: ‘I was so f...ing mad I was going to put a stick of gelly [...] under his shit-can and blow the c..t up’.
[US]C. Goffard Snitch Jacket 94: Rising only to visit the shitcan.

2. (US prison) the punishment cells.

[Aus]Adamson & Hanford Zimmer’s Essay 121: Still-life with bars and shitcan.
[US]E. Bunker Animal Factory 146: ‘Might as well put him away in the shitcan,’ the warden said.