Green’s Dictionary of Slang

(orig. Aus./N.Z.) excellent, wonderful, as it should be.

1905		Duke Tritton’s Letter n.p.: I felt goodoh when I came out and dried myself with the Baden Powell.
1905		J.M. Thomson Bush Boys 34: That was real goodo. [...] We ‘diddled’ them properly [DNZE].
1918		Kia Ora Coo-ee 15 May 5/3: I joined a smoking circle myself, and it was Good O.
1924		Mirror (Perth) 8 Mar. 7/3: They say [...] that Mrs H’s parties are good-o.
1927		Examiner (Launceston, Tas.) 16 Dec. 2/2: It’s ‘good-o’ peeping through the coloured gauze and then diving inside.
1934		T. Wood Cobbers 210: If you want a sleep you’ll find an empty second-class with the lights out, just up the train. You’ll be good-o there.
1941		N.Y. Herald Trib. 29 June 9/2: ‘Good-oh’ is his word for okay. Not infrequently will you hear the traditional good-oh further colloquialized to ‘goody-oh’.
1944		L. Glassop We Were the Rats 49: With what I get workin’ here and what me bruvver Jim gets as a bricklayer an’ makes fightin’ we get along good-o.
1956		K. Amis letter 6 Dec. in Leader (2000) 496: That is sodding good-oh, believe me, sport.
1957		D. Niland Call Me When the Cross Turns Over (1958) 205: It was good-o.
1967		J. Wynnum I’m a Jack, All Right 102: Goodoh for a kickoff [...] What is the main course.
1967		P. Thomas Down These Mean Streets (1970) 54: I felt good-o satisfaction at hearing the cattle stampede down the stairs.
1977		(con. 1941) R. Beilby Gunner 236: Oh, that’d be goodoh.
1982		Down to Earth News: Confest 82 28: I reckon it was real good-oh. Ace, even [AND].
1988		McGill Dict. of Kiwi Sl. 52/2: good-oh exclamation of approval or agreement; variant of right-oh.
2003		McGill Reed Dict. of N.Z. Sl. [as cit. 1988].