Green’s Dictionary of Slang

(S.Afr. teen) a member of the lower classes.

2001		OnLine Dict. of Playground Sl. 🌐 zef n. Lower class individual. To say about someone ‘He’s dressed like a zef!’ was considered really rude.
2014		Mail & Guardian (Johannesburg) 5 Feb. 🌐 In 2009 musical crew Die Antwoord tore a vortex in space [...] with their [...] brazenly creative, ultra South African zef rap.