Green’s Dictionary of Slang

diddleums n.

[note Baker, The Aus. Language (1945), attributes Henry Kingsley with the coinage]

(Aus.) delirium tremens.

[UK]H. Kingsley Recollections of G. Hamlyn (1891) 307: The sawyer [...] a man who prided himself in keeping an eye to windward, and being slightly confused by a trifling attack of delirium tremens (diddleums, he called it).
[Aus]Baker Aus. Lang.
[Aus]N. Pulliam I Travelled a Lonely Land (1957) 232/2: diddleums – delirium tremens.