the State of New South Wales—Australia, 1905—alludes to New South Wales as the ‘mother’ colony, i.e., the first colony that Britain founded in Australia—hence (1908) ‘Ma Stater’, a native or inhabitant of New South Wales
Australian slang, 1960s—the unpalatable and unnutritious evening stew that used to be served to prison inmates—by extension: any unpalatable item of food
colloquially used as a contemptuous appellation for a newspaper that the speaker regards as downmarket—Australia, 1880—but had occurred once (USA, 1874) as ‘bologna sausage wrapper’
the imaginary vehicle supposed to take people to the mental asylum—Australia (1869), New Zealand (1884)—the reason the colour green was chosen is unknown
rhyming slang for ‘drunk’—Australia, 1952—may have originally alluded to ‘Molly the Monk’, the name given in Australia to various primates kept in captivity or used for entertainment