Wow... It is a difficult one, because it is ( or was, nobody uses it) a regional language expression to describe a click that someone does with the mouth to indicate dissatisfaction. I do not know an english expression that summarizes the action.
It could be written, in the past, in a sentence like this: He did a click sound with his mouth to demonstrate his dissatisfacion.
Fazer um muxoxo: To make a sound with the mouth ( tongue and lips) to demonstrate dissatisfaction.