An ugly Christmas sweater is a type of sweater or pullover that is typically worn around the holiday season. It is known for its bright and vibrant colors, loud patterns, and often tacky or kitschy designs. The concept of an ugly Christmas sweater originated in the 1980s, when people began to wear colorful and outrageous sweaters to holiday parties as a way to stand out and have fun. Nowadays, these sweaters are often seen as a fashion statement and are even sold as novelty items.