Keeping your hands in your pockets, what does it say about you?
What does it mean if you pull your eyelid down?
How do you let someone know (in a joking way) that what they are saying is utterly stupid?
This is a gesture that you should apply only among friends. You press your index finger into your forehead. Most likely, Germans will then react by tapping their forehead in this way to demonstrate how stupid they think the speaker is.
Another way to show someone that what they are saying is a bit silly, would be to wave your hands in front of your face. It's another way of saying "You must be kidding me!" or "You are utterly insane".
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