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 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.[1]
- ^ Hayes, Justin Cord. 747 Things to Do on a Plane: From Lift-off to Landing, All You Need to Make Your Travels Fly By. F+W Publications, Inc., 2008.