Text: When someone does something that makes you extremely upset, you would flick your chin with the back of your hand.
Context: The informant got this from the movie “Greece”. He rarely uses it, but an example would be when he is driving and someone almost hits him. He said it means “fuck off” to the person you do it towards. He said he thinks it originated in either France or Italy.
Analysis: I would say this is the equivalent of flipping off your middle finger to someone (meaning “f*** you”), but it is not used as commonly. I am not sure if it is known as well as using the middle finger. When I was younger my friends and I used to do this to each other jokingly and innocently. We used to think it was sign language for the same meaning.