Green’s Dictionary of Slang

1. a withdrawing narcotics user who throws a fake fit, in order to convince a doctor of the need for a supply of drugs.

1933

D. Maurer ‘Junker Lingo’ in AS VIII:2 28: Professional wing-dingers are addicts who make a practice of obtaining their narcotics in this manner.

2. a fake fit.

1949

Monteleone Criminal Sl. (rev. edn) 253: Wing-dinger (n.), a pretended fit or spasm; a forced faint.

3. an outburst of emotion.

1975		K. Willey Ghosts of the Big Country 221: Blackfellows belted tapsticks / And danced the corroboree for us; / And all the bush things took to heel / At the rattatan and din, / As we wingdinged on the Mary.
1976		Teleg. (Brisbane) 5 Aug. 39/3: This leads to a wing-dinger of a brawl, when Bobbie’s brother...sights the louts who have busted up his father and their truck on the bridge .