robbo
/ˈrɒbəʊ/Australian slang. Now rare
noun
A horse and trap, especially one in a ramshackle condition; the driver or hirer of one of these. In extended use: an inferior, substandard, or decrepit person or thing.
Origin
Late 19th century; earliest use found in The Bulletin. Apparently from rob- (in the surname Robinson: see below) + -o.