A classic suggesture of making a "V" with your index and middle finger, i.e. the victory sign, while sticking your tongue through emulating cunnilingus.
The best way to calm someone down with road rage, especially a guy, when they flip you off is to retort with the victory tongue - it confuses them and tends to calm down the situation. If it is a woman, you may even end up flattering her.
by the coMANd'r March 16, 2015