Green’s Dictionary of Slang

1. an unattractive woman.

1954		(con. 1940s) T.A.G. Hungerford Sowers of the Wind 189: ‘You should lamp ’em!’ ‘What — drac?’.
1955		Aus. Women’s Wkly 16 Feb. 25: [headline] are you a drack or a dream?
1966		B. Beaver You Can’t Come Back 26: I thought she was going to kiss it [i.e. my hand] or maybe bite it like another silly drack I knew once did [AND].
1977		W. Moore Just to Myself 13: She was a bit of a drac, but we put up with her [AND].

2. a police officer.

1960

S. Woodfield A for Artemis 34: It was the police chief. It was as much as I could do to stop yelling, ‘Quick Bill, the dracks are in.’ [AND].