Have the happiest Christmas since Bing Crosby tap-danced with Danny f@#$ing Kaye in this red long sleeve from National Lampoon's Christmas Vacation, with Clark Griswold delivering his classic line, "Hap Hap Happiest Christmas" in a retro-stylized graphic on the front. Made from 100% cotton, this is just the thing for an old-school, four-alarm holiday emergency.