Christmaser 

Someone who excessively, prematurely celebrates Christmas. A Christmaser jumps right from Halloween to Christmas. Completely ignoring Thanksgiving. A Christmaser watches Hallmark Christmas Movies in August, etc.

My neighbor dressed up as Buddy the Elf for Halloween, what a Christmaser.
If you have ever posted, "only 364 more days until Christmas" on Facebook, you might be a Christmaser .

Christmaser by Tom Turkey November 2, 2018

arkansas christmas cookie 

Arkansas christmas cookie is when one person lays in the snow making a snow angel while another person urinates on them. The urine acts as the "sprinkles" on the "angel"

My girlfriend was so excited for the first snow of the year, she laid down in it and started making a snow angel. I used this opportunity to make her a arkansas christmas cookie!

arkansas christmas cookie by Ttboy888 February 13, 2017

Diarrhea Christmas Lights

Explosive pixel squirts filled with colorful bytes & chunks that a video game uses to blind us.

The dragon’s maw twas lit enough due to the incoming inferno without need of copious lasers; oh how the diarrhea Christmas lights distract me so.

Diarrhea Christmas Lights by 2nd string, 2nd fret March 31, 2020

War on Christmas 

a figment of the imagination of Fox News concocted solely for the purpose of stoking anger against secular progressives.

According to Fox News last year, Christians won the 'War on Christmas'.

War on Christmas by rustyshackleford January 4, 2008

Wish that person Merry Christmas on New Years 

Mess with someone’s head

I want to “Wish that person Merry Christmas on New Years”

Wish that person Merry Christmas on New Years by MidnightThoughts March 30, 2020

Kelly on christmas 

Drinking enough alcohol during a family function that you begin to give awkward speeches, swear uncontrollably around children, lose your phone, etc

I thought everything went great at my cousin's graduation, but I found out the next day that I got drunk like Kelly on christmas.

Kelly on christmas by white d'angelo January 3, 2014

Christmas II 

Includes many traditions such as consuming sloppy seconds, opening gifts two at a time, having two trees and cooking twice as much food.

Made to prove that anything can get a sequel.
Date: Debatable, but thought to be some random weekday in mid-April.

Person 1: What'ya doing?
Person 2: Just preparing for Christmas II! The celebrations are gonna be amazing!

Christmas II by Mickey_G_ April 15, 2019