The accumlation of stress and anxiety before/during/after Xmas.
"Around this time, me and my family suffer Yuletide Trauma Syndrome all too regularly."
by Izzyexile December 18, 2014
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A woman that shows up to your christmas party of any sort just to ruin a good time for everyone at the party
Chelsey showed up to the christmas party just to let her anger out on everybody at the party and smashed the chocolate fountain, she is such a yuletide bitch.
by Shaelyn hater December 12, 2020
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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?
by Peenutz December 29, 2020
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The days following Christmas when the excitement of new presents has worn off and it's time to return to work.
Manager/boss: "Why so glum today?"
Employee: "I'm suffering from PYS"
Manager/boss: "What?"
Employee: "Post Yuletide Syndrome"
by Lingo Gringo December 24, 2011
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