Green’s Dictionary of Slang

drack adj.

(Aus.) second-rate, inferior, unattractive.

1900		Sydney Sportsman (Surry Hills, NSW) 3 Oct. 1/2: He tried to sell me some scourah jewellery and schorumed about his drac stuff. I had to give him the giswhent.
1945		Baker Aus. Lang. 127: Sope is an old larrikin word [...] A writer in 1907 describes it as ‘the direct antithesis of bonzer. ... It expresses all that is condemnable in anybody or anything.’ It is now obsolete. Drack and bodger are modern equivalents.
1949		R. Park Poor Man’s Orange 180: He was always stuck with drack types like Dolour Darcy.
1952		Argus (Melbourne) 18 Jan. 5/1: It was up to everyone to show the world it was not a drack town.
1953		T.A.G. Hungerford Riverslake 94: It’s a football dance, not one of those drac turns they slap on for the locals.
1953		Advertiser (Adelaide) 21 Nov. 4/4: The girls say, ‘Mum, you look drack!’.
1986		R. Beckett Dinkum Aussie Dict. 22: Drack: Dowdy in one’s personal attire.
1988		McGill Dict. of Kiwi Sl. 39/2: drac(k) awful or ugly, as in Dracula.
2003		McGill Reed Dict. of N.Z. Sl. [as cit. 1988].

In compounds

drack sort (n.) (also drack sack, drak sort) [SE sort, a type (of person)]

(Aus.) an unattractive person of either sex.

1953		K. Tennant Joyful Condemned 26: To him all girls were collectively ‘the brush’; some were ‘hot dishes’, and others ‘drak sorts’.
1967		F.J. Hardy Billy Borker Yarns Again 136: The worst service in the world. Drack sorts for hostesses, poor service, drunken pilots.
1968		S. Gore Holy Smoke 79: She wasn’t a drack sort [...] She’s pretty good-lookin’.
1972		A. Chipper Aussie Swearers Guide 38: A drack sort often has a mind of her own, refuses to be segregated at parties, and complains bitterly when asked to [...] watch footie in the rain.
1972		Sydney Morning Herald 26 Sept. 9: Mr Hardy said he would put aside his memories [...] of meeting Raquel Welch (‘A drac sort – not nearly as good looking in the flesh as you would expect’) [GAW4].
2004		‘Australia Decoded’ at Joyzine 🌐 drack sack/sort – slattern; unattractive person, especially a woman: e.g., What a drack sort his wife is!