In Welsh Christmas tradition, Mari Lwyd is the horse-skull folk custom involving a decorated figure visiting homes and pubs.
The Mari Lwyd is usually made from a real horse’s skull covered with a white cloth, with ribbons and other decorations attached. A person carries it on a pole, while others accompany the procession with music and singing.
The central activity is a playful exchange of verses at a doorway. The visiting group and the household trade improvised or prepared insults and rhymes until the visitors are admitted. Once inside, the group may sing, drink and continue the celebration.
The custom is associated particularly with South Wales and is generally practiced during the winter holiday season. It is often described as a Christmas tradition, although its precise origins and earlier meanings remain debated.