Yuletide Perineum Share definition Flag The period between Christmas and New Year when you are sick of turkey and Twiglets, and have no idea what day, week or month it is Hey, Happy Yuletide Perineum, have a twiglet..umm what day is it? Yuletide Perineum by Peenutz December 29, 2019 Get the Yuletide Perineum mug.