Comport oneself properly is a phrase that means to act in an appropriate manner. It is often used as a reminder to people to be respectful and courteous to others. This phrase is often used in the context of social etiquette, such as when attending a formal event or gathering. The term 'comport oneself properly' is derived from the Latin word 'comportare, ' which means to bring together or to unite. In other words, it is a reminder to bring together one's behavior and attitude in order to create a harmonious atmosphere.