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1.
An abbreviation for Christmas, from the Greek spelling of Christ, the first letter of which was chi ("X").
Merry X-mas.
by Alexei December 23, 2003
 
2.
Contrary to popular belief, the X in X-Mas was not made up by the secular heathens in California (no attack intended). X-Mas was a shorter version of Christmas, first used in Europe around the 1500s. In Greek, Christ's name started with an X, Xristos. Thus, it is literally, "Christ-mas", or "Christ's Mass".
X-mas = Christmas
So, you are not offending God when you say Xmas.
by Doobie Smokes You December 06, 2004
 
3.
It just means Christmas. It's easier to write if you put an X. No one is trying to take the precious CHRIST out of Christmas. For God's sake, lighten up. Your religion's not going to die because we say Xmas instead of Christmas.
"Merry Xmas, Mr. SupersensitiveChristian."

"Get out of my house, Devilchild."
by Ughguggeugghghhghghg December 31, 2004
 
4.
'Xmas' is another way saying 'Chirstmas' which is supposed to be more secular than the latter. However, the 'X' part of 'xmas' was used by early Chirstians to identify themselves as a follower of Christ. By marking an 'X', they signified either a safe house, gathering place, or the like. X is the character for the Greek letter "Chi" which was the first letter of Jesus' name in Greek.

To say that xmas may have no religious value today is perhaps true, but ironic becasue xmas and Chirstmas are literally one in the same.
Parishioner: Happy Chirstmas, father.
Priest: Happy Xmas!
by Andrew Dombos July 26, 2005
 
5.
XMA
Xtreme Martial Arts

Usually a combination of the most aesthetically pleasing moves from multiple martial arts, strongly based off of wushu and tae-kwon-do 'trick moves' (see tricking). Many of these tricks are very difficult to pull off and require extensive training and 'set-ups' such as the illusion, butterfly kick, and the j-step. Some XMA artists are Steve Terada, Tony Jaa, and John Eigo.
Some XMA moves: Tornado Kick, Butterfly Kick, Butterfly Twist, Raiz, Sideswipe, Snapu-swipe, 360 Gyro, Hyperswipe, Hypertwist, Aerial-twist, Fei-long kick, Au-batido, Masterswipe, Flashkick, J-step Gainer and many others...

Cool guy A "Hey dude, check out my B-twist!"
Friend "Dude that move is the shizz, you could get all the ladies with it!"
by HomeSkillet! December 13, 2006
 
6.
The festive holiday in the tv show Futurama. Having created a robot Santa to carry out the work of a real Santa, an error in his programming causes him to judge that everyone is naughty. Xmas is therefore a holiday of fear, where all hide from Robot Santa as he tries to kill everyone he finds on xmas day.
The xmas song! (to the tune of Santa Clause is coming to town)
He Knows when you are sleeping
He knows when you're on the can
He'll hunt you down and blast you're ass from here to Pakistan!
You Better not move you better not move
You're better off dead, I'm telling you dude
Santa Clause is gunning you down!

merry xmas everybody!!!
by Dr Wally December 19, 2010
 
7.
Xmas quite literally means Christmas. The 'X' is a representative of the Greek symbol chi which means Christ. There for Xmas stands for Christmas and is just a short hand version of writing Christmas, and in no way removes the religious connotation of the holiday.
Person 1: Merry Christmas!
Person 2: Merry Xmas to you too!
by JustSoYouKnow2011 January 02, 2011