To move idly or aimlessly; to fidget or dawdle.
Possibly related to or a variant of 'diddle,' which has uncertain origin but may be reduplicative in nature, imitating meaningless or repetitive motion.
Like many words for purposeless movement ('fidget,' 'dawdle,' 'putter'), 'didle' is onomatopoetic—the sound of the word itself almost mimics the lazy, restless movements it describes.
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