An Ugly Sweater, also known as an ugly Christmas sweater, is a humorous and festive piece of clothing typically worn during the holiday season, especially at holiday-themed parties and gatherings. These sweaters often feature bold and gaudy designs, including bright colors, holiday-themed patterns (such as reindeer, snowflakes, or Christmas trees), and sometimes even 3D embellishments like bells or tinsel. The charm of an ugly sweater lies in its intentionally tacky and over-the-top appearance, making it a fun and lighthearted way for people to celebrate the holiday season with a sense of humor and style.