We cannot dither, we cannot just twiddle our thumbs, or wait and see.
The leader then says, "Do as I do, twiddle thy thumbs and follow me."
I twiddle your little good Andrew to assert it for us twenty times a day.
On the other side he could twiddle his fingers at the corporal, who dared not pursue.
Get under the pilot an' sort o' twiddle ye off the track, don't they?
His head drooped lower—he began to twiddle the fob on his watch chain.
And the rest of us are to sit and twiddle our thumbs while you soliloquize?
A man who has been active hates 270 to sit down and twiddle his thumbs.
And I think, by then, she'll be able to twiddle over them wires by herself.'
I s'pose a gentleman would sit down and twiddle his fingers, and do nothing.
1540s, "to trifle," of unknown origin; of the fingers, first recorded 1670s. Figurative phrase twiddle one's thumbs "have nothing to do" is recorded from 1846; to twirl one's thumbs in the same sense is recorded from 1816. Related: Twiddled; twiddling.
Perfect foresight of what has already been seen: observers empowered with 20-20 hindsight wanted to know (1962+)