"But you already know," said Dumbledore. He twiddled his thumbs together.

“其实你已经知道了。”邓布利多说。他旋弄着两个大拇指。

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Mozart twiddled his thumbs in Munich by writing the Piano Sonata in B-flat, K. 281.

NPR: Mozart's Job Hunting Dilemma

Just two years ago the President twiddled his thumbs while Saddam brazenly wiped out opposition forces in the supposed safe haven we had "guaranteed" in northern Iraq.

FORBES: Fact and Comment