M is for Merry Christmas with the moosiest moose we know, Marty Moose. This National Lampoon's Christmas Vacation t-shirt features an image of the Marty Moose Christmas mug that Chevy Chase is seen drinking out of in the 1989 holiday classic. The t-shirt reads Griswold Family Christmas. For many, the John Hughes movie Christmas Vacation is a holiday favorite, and now you can show that you are a fan with this Griswold Family Christmas t-shirt. This t-shirt is a symbol of the spirit of the Griswold Family Christmas.