Thumbs up

Thumbs up is a hand signal used to indicate approval of anything. It is made by forming a fist and pointing your thumb upwards, accompanied with an enunciated "Thumbs up!".

The proper way to make the signal

Variations include using both hands instead of one to indicate even greater approval, "Thumbs down!" to indicate disapproval, and "Thumbs diagonally downward!" to indicate a slight disapproval.