Green’s Dictionary of Slang

(Aus. / US) a euph. for damned adj.

1843		Satirist & Sporting Chron. (Sydney) 11 Feb. 1/2: The ding-dong rubbish of professions has been very lavishly laid out by this party — he is for the ‘greatest happiness of the greatest number’, ‘for ‘entire religious liberty’ [etc].
1907		Sun. Times (Perth) 4 Aug. 4/8: But the ding-ding day / Ain’t come my way / When Sportsmen Stood Aghast!
c.1940–5		‘Myles na gCopaleen’ Best of Myles (1968) 233: The actual symphony concert range is a strictly ding-dong limited list for a kick-off.
1963		C. Wood ‘Prisoner and Escort’ in Cockade (1965) I iii: What a ding dong shame.
1964		A. Hine Unsinkable Molly Brown 136: Is there [...] any single simple ding-dong little thing I ever did that was really me?
1975		J. Roe The Same Old Grind 163: ‘You’re out of your ding-dong gourd!’.