Green’s Dictionary of Slang

(S.Afr.) a young (middle-class) person indulging and flaunting conspicuous consumption (and often destroying their purchases).

2013		BBC News Mag. 2 Feb. 🌐 Going out with South Africa’s flashy young ‘boasters’ [...] In township slang, these children are known as izikhotane (the boasters). In recent years, they have become a huge social phenomenon as they gather in their hundreds – even thousands – at parks dressed in their expensive outfits.
2013		Ace’s View 🌐 These children known as izikhotane (the boasters) are the descendant of South Africans who were once regarded as ‘kaffirs’ (niggers) [...] once again — say it with me —in their own freakin’ country, only to turn and spend their parents back into poverty.