E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Shakes.
No great shakes. Nothing extraordinary; no such mighty bargain. The reference is to shingle for the roof of shanties, or to stubble left after harvest for the poor.
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The cabin itself is quite like that of the modern settlers, but the shingles, called shakes, make the wood roof unique.Harpers Weekly, July 18th, 1891, p. 534.
Ill do it in a brace of shakesinstantly, as soon as you can shake twice the dice-box.