Green’s Dictionary of Slang

(UK Und.) a shabby, dirty man.

1809		G. Andrewes Dict. Sl. and Cant n.p.: rumbo dick shabby dirty fellow.
1829		Pierce Egan’s Wkly Courier 22 Mar. 4/1: ‘We must behave like gemmen,’ said Rumbo Dick.
1835		G. Kent Modern Flash Dict. 28: Rum bodick [sic] – dirty, shabby fellow.
1848		Flash Dict. in Sinks of London Laid Open.
c.1850		Duncombe New and Improved Flash Dict.