Green’s Dictionary of Slang

hominy n.

[the main constituent of prison meals]

SE in slang uses

In compounds

hominy bus (n.)

(Aus. prison) the bus that runs between Darlinghurst Prison and Long Bay Prison.

[Aus]‘No. 35’ Argot in G. Simes DAUS (1993) 107/2: The gaol tram that runs between Darlinghurst Police Station & Long bay Prison is called the ‘Ominy bus’ – rather neat pun!
hominy gazette (n.)

(Aus. prison) internal prison rumours.

[Aus]V. Marshall World of Living Dead (1969) 85: O, no more I’ll quiz the Hominy Gazette for shearin’ news / Or’ll use the holy Bible fer me fags.
[Aus]‘No. 35’ Argot in G. Simes DAUS (1993) 107/2: hominy gazette Gaol rumour [...] because it went round in the morning when the cells were opened to distribute the morning hominy.
hominy pimples (n.)

(Aus. prison) an itchy rash, prevalent in summer, which prisoners ascribe to the monotonous diet.

[Aus]‘No. 35’ Argot in G. Simes DAUS (1993) 107/2: Hominy pimples is the name given to an itchy rash that most prisoners get during the summer & which they attribute to this diet of [hominy] porridge.
hominy prick (n.) (also hominy cock)

(Aus. prison) a substitute ‘penis’ made by stuffing a sock with hominy and used by women prisoners for masturbation.

[Aus]‘No. 35’ Argot in G. Simes DAUS (1993) 107/2: hominy pr-ck or c--k imitation penis made from hominy in a sock, etc., by women prisoners for masturbation.