Green’s Dictionary of Slang

bongo n.1

also bongo lips, bungo
[Bongo, seen as a stereotypically ‘African’ name]

(orig. US, also bongo-bongo) a derog. term for a black person .

[UK](con. 1948–52) L. Thomas Virgin Soldiers 48: Thumbs up, we’ll beat the Germans, or the Bongos, or whoever.
[WI] (ref. to 1940s) L. Bennett Jamaica Labrish 221: bongo, bungo. black-and-ugly.
J. Roe Same Old Grind 17: ‘Who be calling’ [sic] who trash?" whined Zehyah. ‘We weren’t discussing you, Bongo-Bongo,’ said Jonquil. ‘We’re not terribly fascinated by your ethnic number [ibid] 153: ‘They usually have some black hooker work the upstairs room. Can you spot plainclothes, Bongo? Because if you’re busted for lewd the sarge can’t do anything for you’.
[US]T. Wolfe Bonfire of the Vanities 187: So I don’t know what kinda minorities they’re talking about, unless a buncha bongos carrying lengths a pipe.
[US]Bentley & Corbett Prison Sl. 55: Bongo Lips A black person.
[US]mike2133 posting 6 Nov. 🌐 you sure do have plenty of free time, bongo lips, all you gotta do is cash mommas welfare check! [...] go back to africa you porch monkey! you don’t even have the nigga ride, go back to dreaming bongo lips!
[US]N. Walker Cherry 136: [of Iraquis] [A] white bongo truck was coming down the road [...] I pulled my rifle up and aimed where I guessed the driver’s face was.

In phrases

bongo-(bongo) land (n.) [note Winnie Lightner ‘comedy’ song about Africa: ‘Bingo Bongo Land’ (1929)]

(orig. US) a Third World/African country.

Bell & Newby Doing Sociological Research 51: A great deal of fieldwork obviously does consist of just sitting around, which may well be the right and proper thing to do in Bongo-Bongo Land.
[UK]P. Theroux Picture Palace 135: Most of those black pimps [...] looked like kings and princes of Bongo-land.
[Aus]Meanjin Quarterly (Melbourne) XLVI 181: The suggestion by Tory Minister Alan Clark [...] that ‘blacks’ should be sent back to ‘Bongo Bongo land’.
A. Thorpe Pieces of Light 383: Unless they have typewriters out in Bongo-Bongo Land.
[UK]Guardian G2 21 Feb. 15: I have been asked, before a trip to Bangladesh, when I was setting off for ‘bongo bongo land’.
H. Kunzru My Revolutions 68: She buggered off to Ghana or Bongo-Bongo Land or somewhere to go and save the little black babies.
[UK]Guardian 7 Aug. 🌐 [headline] UKip MEP attacks ‘bongo bongo land’ aid.
[UK]in Times 29 June 🌐 Does that include the 40,000 votes from the Vatican (Pop 800) and the votes from antarctica, America New Guinea, Bongo Bongo land.
[UK]R. Milward Man-Eating Typewriter 160: I misplaced my certificate [...] in one of those blasted Bongo-Bongo ports.
[UK]J. Meades Empty Wigs (t/s) 630: The governor - previous experience keeping down the natives in Bongo Bongo.