When someone is whining and you are tired of hearing it, you can play the world's smallest violin to provide musical ambiance to dramatize their annoying whine. This is accomplished by rubbing your index finger and thumb together and saying, "This is the world's smallest violin, and it's playing just for you."
Joshua: "America would be so much better if we were a communist country. Everyone deserves to have equal wages, we are all people and that is true equality."
Jeffrey (rubbing fingers together): "Do you hear that Joshua? I got the world's smallest violin, and I'm playing it just for you."