Green’s Dictionary of Slang

quacktail n.

[her hairstyle, either a ponytail or a duck’s arse n.]

1. (S.Afr.) the girlfriend of a township gangster.

[SA]L.F. Freed Crime in S. Afr. 81: The ducktail girls are also known as ‘quacktails’, ‘sheilahs’, and ‘pony-tails’; they act slick and smart and sophisticated; they are gaudy and brash, and quite unself-conscious.

2. attrib. use of sense 1.

[SA]L.F. Freed Crime in S. Afr. 83: White ducktails in jeans and colourful shirts have been known to take their ‘quacktail’ tarts to brothels in African areas.