The present participle of 'didder'; currently shaking or trembling, or describing someone indecisive and hesitant.
From 'didder' with the present participle suffix '-ing,' which transforms the verb into a continuous action or an adjective describing ongoing motion or uncertainty.
In British English especially, 'diddering' also means being indecisive or flustered—the physical trembling meaning expanded metaphorically to describe someone's mental state when they can't make up their mind!
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