Thumb signal

A thumb signal, usually described as a thumbs-up or thumbs-down, is a common hand gesture achieved by a closed fist held with the thumb extended upward or downward, respectively. The thumbs-up gesture is associated with positivity, approval, achievement, satisfaction and solidarity, while the thumbs-down gesture is associated with concern, disapproval, dissatisfaction, rejection and failure.

"Thumbs Up" redirects here. For other uses, see Thumbs Up (disambiguation).
(Left) A thumbs-up and (right) a thumbs-down.
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