Christmas Must 

A non-alcoholic bevrage consumed in Scandenavia, often during christmas and easter, when it's called "Påskmust".

Damn, that's som fine christmas must

Santa likes our must

Don't be greedy with that must!

Christmas Must by Daniel Craig McFister December 29, 2008

Christmas Mustache 

The act of growing a creeper-stache in order to scare children around Christmas time. (also works to frighten in-laws).

"Mommy Mommy...thats not Santa! He's SCARY!"
"Thats just some creeper with a Christmas Mustache, sweety..."

Christmas Mustache by sterile_babe111 December 4, 2013

Mustn't Masturbate Merry Christmas 

"Mustn't Masturbate Merry Christmas" is a challenge given to mostly men that revolves around that masturbating for all of Christmas Eve and Christmas day. Those who fail are forced to become elves, working in Santa's workshop for the rest of their lives. Those who pass, however, are given 30 minutes to do what they'd like with Mrs Claus, Santa's wife. Most, however, tend to pork her.

Person 1: Why have you been so down recently?
Person 2: I don't know. I just can't find the holiday spirit.
Person 1: Just participate in "Mustn't Masturbate Merry Christmas"!
Person 2: What's that?
Person 1: *shows them Urban Dictionary definition*
Person 2: Don't ever talk to me again.
Person 1: *commits suicide*

Mustn't Masturbate Merry Christmas by Your Materfamilias December 23, 2018