Green’s Dictionary of Slang

ding-dust adv.

[ext. of ding v.1 (1)]

(Ulster) very fast.

[Ire]W. Carleton ‘The Hedge School’ in Traits and Stories of Irish Peasantry I (1868) 272: While they were ding dust at it, who comes in but mad Delaney, and he attacked Mat.
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