Green’s Dictionary of Slang

1. (W.I., Jam.) a crude, boorish, ignorant black person, a country bumpkin; cite 1846 is a generic for any black person.

1833		M. Scott Tom Cringle’s Log (1862) 217: Only think, sir, – Bill and Timothy Tailtackle waited on by a black Bungo!
1846		Bell’s Life in Sydney 19 Sept. 3/1: Bungo called him a d—d Welch son of a female puppy.
1907		W. Jekyll Jam. Song and Story 12: The Jamaican looks down on the Bungo (rhymes with Mungo) who ‘no ’peak good English’.
1976		L. Barrett Sun and the Drum 20: Another name for a slightly wild character is bungo. It has the connotation of a ‘hooligan’.
1980		(con. 1950s) M. Thelwell Harder They Come 25: You is a bungo? You no know what sporting woman is?

2. see bongo n.¹