Do you want to be the person in your Secret Santa circle to give the most unique present this year? Merch might just be your shot. Hosted this Sunday, December 6 (450 W 147th St at Convent Ave, No. 52; 1–6pm), this one-day shopping event will feature customized American Apparel T-shirts by Marianna Ellenberg “that give STDs a cool retro style.” Also available will be Guantanamo baby onesies by artist Paul Chan, designer Hip-Hop Snowman Christmas sweaters by Angie Waller, and more bizarre trinkets and tidbits by Blanka Amezkua, Ben Coonley, Susan Havens and Matthew Mottel. If you want something picture-perfect for your lover/friend/neighbor/colleague, bring a photo and get Arthur Jones to draw one of his imaginative caricatures.—Emily Bauman