Well, it is none so dusty, or Not so dusty. I donʹt call it bad; rather smart. Here dusty is the opposite of neat, and neat = spruce. “None so dusty” or “Not so dusty” means therefore, Not so unspruce, or rather smart.
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Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.
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