Like a man/woman possessed phrase
In a way that shows too much excitement or energy that seems uncontrollable.
When he went outside after a month of staying indoors, he ran around like a man possessed.
Someone is knocking on our doors like a man possessed.
When I saw Mary, she was sitting on the sidewalk and shaking like a woman possessed due to cold.
To behave wildly, frequently as a result of excitement.
This phrase was formed based on the meaning of the adjective "possessed".
This phrase emphasize that Christmas takes place once a year time, so you should grab this chance to indulge yourself and be good to others.
I've eaten a little more than usual as today is Christmas and Christmas comes but once a year, right?