Shilly Shally.
A corruption of “Will I, shall I,” or “Shall I, shall I.”
“There’s no delay, they neʹer stand shall I, shall I,
Hermogʹenes with Dalʹlila doth dally.”
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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.