Tacky Christmas Sweater Party Invitation Wording. ‘Tis the season for ugly Christmas sweater parties! If you’re hosting one of your own this year, check out these “tacky” invitation wording samples. Perfect for office parties or even a neighborhood event, here is a look at some of the best ugly Christmas sweater party invitation wording. These festively funky holiday party invitations feature all your favorite knit patterns for ugly sweaterfun! With colorful designs and traditional holiday motifs!