Green’s Dictionary of Slang

(S.Afr.) finished, over, unhappy, lacking in good sense, crazy, exhausted.

1977		F. Dike First South African 22: Hey, but Mtshiselwa is bafok.
1980		A. Dangor ‘Waiting for Leila’ in Waiting for Leila (2001) 24: Maybe that’s why he’s so befok.
1985		Frontline Aug. 54: I don’t suppose it’ll ever end. It’ll go on until the blacks get the vote, and then we’re befok [...] Guys who spend long enough living in the bush end up bedonderd, but that’s just normal army befok, it’s not bossies like from war.
2010		IOL News (Western Cape) 15 June 🌐 ‘Befok’ is the best word for crazy.