Types of gestures

<h3>Touched / screw loose</h3>
<p data-rte-fromparser="true">Tapping one's index finger against the head indicates that a person or an idea being discussed is insane or "touched in the head". A similar, more elaborate gesture uses a circling motion of the finger at the temple or side of the head. This signifies that the person is "mixed up" or "has a screw loose".  In Germany, tapping or pointing to the temple is used as an insult, often with the accompanying phrase "du hast einen Vogel."  While this literally means "You have a bird," it is idiomatic for saying that you are insane.  Also, in Indonesia, drawing a line across the forehead with the side of the right index finger denotes a similar meaning.
</p><p data-rte-fromparser="true" data-rte-empty-lines-before="1">A variant of this one is the suicide.  Make a gun with your hand and pretend to shoot point blank at your own temple.  It can be accompanied with sticking out the tongue or a shooting sound for full effect, and often implies that the speaker is a "complete idiot".  A more recent use of this is in the movie, "<i><a data-rte-meta="%7B%22type%22%3A%22internal%22%2C%22text%22%3A%22The%2040-Year-Old%20Virgin%22%2C%22link%22%3A%22The%2040-Year-Old%20Virgin%22%2C%22wasblank%22%3Atrue%2C%22noforce%22%3Atrue%2C%22wikitext%22%3A%22%5B%5BThe%2040-Year-Old%20Virgin%5D%5D%22%7D" data-rte-instance="989-1256109945d86b00a902dc" class="new" title="The 40-Year-Old Virgin (page does not exist)" rel="nofollow" data-uncrawlable-url="L3dpa2kvVGhlXzQwLVllYXItT2xkX1Zpcmdpbj9hY3Rpb249ZWRpdCZyZWRsaW5rPTE=">The 40-Year-Old Virgin</a></i>" where one of the characters, after being bored with a conversation, proceeds to aim at his temple and pretend to fire.  Afterwards, he uses his other hand and does a reverse cupping motion outward from the other side of his head to signify his brains splattering out.
</p><p data-rte-fromparser="true" data-rte-empty-lines-before="1">In Japan, a variation of this is knocking on the temple with the knuckle of the index finger. This is usually used in reference to the signer; "I'm such an idiot!"
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