Green’s Dictionary of Slang

(S.Afr.) a terrorist.

1990

P. Hotz Muzukuru 11: ‘Now what is a terrrorist?’ he asks [...] ‘Tell me what these gandangas are.’ [Ibid.] 47: The place is chock-a-block with Afs who want to join up. Ask them why, and they’ll tell you, ‘the gandangas just raped my sister’.