world’s tiniest violin

"Playing the world’s worlds tiniest violin" as many people would call it, is when you rub your pointer finger and thumb together in a steady motion, which basically signals to anyone you do it towards that you expect money from them. Bellboys and luggage carriers often used to do this back in day in hotels when they wanted a tip but didn’t want to be so straight forwards as to ask for it directly although it has been used plenty of other places too.