A Christmas mummer is a traditional character in English folklore who dresses up in outlandish costumes and goes from door to door entertaining people during the Christmas season. Some synonyms for Christmas mummer include mummers, wassailers, yule lads, and guisers. Each of these terms refers to a group of people who perform rituals and plays during the Christmas season to bring good luck, happiness, and prosperity to their communities. Although these traditions have evolved over time, they remain an important part of the Christmas celebrations and are still enjoyed by people of all ages throughout the world.