For those seeking a costume that is certain to get a laugh, you can go wrong with the patriarch of the Griswold family, from the holiday comedy classic “National Lampoon’s Christmas Vacation”. You’ll just need a garish Christmas sweater, whether purchased or homemade, paired with high-waisted jeans, serves as the foundation for this getup. To truly sell the look, don’t forget to add a strand of Christmas lights around the neck, a nod to the character’s ill-fated efforts to decorate his home.