Green’s Dictionary of Slang

(S.Afr.) the former Republic of Bophuthatswana, one of the black ‘homelands’ with its territory surrounded by the Transvaal and Orange Free State.

1982		Pace Nov. 47: No members of the United Nations, except South Africa, recognises Boph-phphphphuthaTswana [sic] ... Bop had adopted the attitude that as long as they recognise themselves as a country and a nation, they couldn’t care a hoot for world recognition [DSAE].
1990		Weekend Post 29 Sept. 8: The ANC still saw Bop as ‘a bastard child of apartheid’ and insisted on its reincorporation [DSAE].