Well, it's a bit of a tongue-in-cheek term. It refers to those really gaudy and over-the-top sweaters that people wear around the holidays, you know, with all the festive designs and sparkly embellishments. It's a way of making fun of the fashion trend while also celebrating its unique charm. I mean, who can resist a good ugly Christmas sweater? They're a holiday staple, and they always bring a smile to people's faces. So, that's where the name comes from!