Green’s Dictionary of Slang

(S.Afr.) to moan, to whinge.

1986		P. Slabolepszy ‘Boo to the Moon’ in Mooi Street (1994) 115: Don’t feel you have to stay because a’ me, hey, I don’t sug. ’Strues Bob.
1989		B. Simon ‘Score Me the Ages’ Born in the RSA (1997) 139: Ag nobody’s sugging man, come here. [Ibid.] 171: They’d fucken sug if I wasn’t on that corner!