Green’s Dictionary of Slang

(S.Afr.) the white mistress of a house, the employer of domestic servants.

1985		J. Makunga in Staffrider 6:2 36: He crept towards Tsidi’s ‘dog’s-meat’ home, so-called because when the maddie went shopping, part of the meat she bought was allotted the servant [DSAE].
1988		Pace May 4: One day he brought his son to work and the maddies assumed he’s a darkie like his daddie [...] The maddies as usual instructed the poor boy as they always do to darkies to clean the machines [DSAE].