Not all holiday parties are created equal. There are those fancy, bougie, dress-to-the-nines types of gatherings that warrant wearing your finest festive attire. Then there are the parties most of us are a little more comfortable attending — the ugly Christmas sweater party. The ugly Christmas sweater party phenomenon has gone from something you heard about in the ‘90s, to a full-blown, multiple parties per year holiday marathon. Ugly Christmas sweater parties are the adults’ way of reliving those Thursday night college costume parties from years back — and that’s OK.