Green’s Dictionary of Slang

(Aus./N.Z.) something exceptional.

1919		Eve. Post (Wellington) 27 June 2/7: [advert] Wellington Rugby Football Union / Athletic Park / To-morrow 2.45 p.m. / The ‘Ruby-Dazzler’ / Athletic v. Poneke / [...] / The Game of Games.
1941		Baker Popular Dict. Aus. Sl. 62: Rube, [...] something esp. fine. Rubydazzler, as for ‘rube’.
1955		N. Pulliam I Travelled a Lonely Land (1957) 238/1: rubydazzler (ruby) – a humdinger.
1964		E. Wier Rumptydoolers 134: It was a ruby-dazzler of a barney, it was. A real battle.
1988		McGill Dict. of Kiwi Sl. 94/2: rubydazzler excellent person or thing, a rube for short.
1991		Canberra Times (ACT) 24 Apr. 26/4: The best suggestion of the week for the name to replace beaujolais, now that the French have won the court case preventing us from using the term, comes from Max Lotton [...] ‘Ruby Dazzler’.
2003		McGill Reed Dict. of N.Z. Sl. [as cit. 1988].
2016		V. Curtis Small Business for Dummies: Aus. & N.Z. [ebook] So you thought your employee was the bee's knees, the cat's pyjamas, a true ruby-dazzler and more.