Thumb twiddling
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Thumb twiddling is an activity that is done with the hands of an individual whereby the fingers are interlocked and the thumbs circle around a common focal point, usually in the middle of the distance between the two thumbs.
While it is an expression of at least a moderate amount of manual dexterity, thumb twiddling is frequently used as an example of a useless, time-wasting activity. It has even been proposed as "the ultimate exercise for the bored and lazy".[1]
Medical uses
Thumb twiddling can be used as a simple test for manual dexterity.[2]
See also
References
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