What is underdressed for the occasion?

Underdressing for an occasion means showing up in clothing that is too casual or inappropriate for the event. This can happen when someone misjudges the level of formality of the event or simply fails to put effort into their outfit. Underdressing for an occasion can make a person feel uncomfortable or out of place, as well as give the impression that they are not taking the event seriously or disrespecting the host and other guests. It is always advisable to dress appropriately for an occasion to show respect and blend in with the crowd.