Circling the Finger at the Temple
You form your hand into a fist, keeping your index finger extended, place its pad against your temple, and turn your wrist from side to side.
What does it mean?
1. The gesture indicates madness, inappropriate behaviour, or someone committing an extremely unreasonable or absurd act.
2. It is usually used in reference to a person or their actions as going beyond generally accepted logic and common sense.
3. A hint that the person is "not quite right in the head."
4. Depending on the situation, it may express open contempt, extreme bewilderment, or caustic irony. It is clearly dismissive, judgemental, or mocking in character.