When a fat woman's inner thighs rub together causing the loose fitting shorts to ride up into her crotch.

The result is a shape of a christmas tree. High up top, tapering down and out.

The typical reaction is to point it out to your friends and start singing a custom version of the holiday classic, Oh, Christmas Tree, so only the people you are with can hear it.
Check out that fat chick in front of us.... Oh, Christmas Tree, Oh, Christmas Tree A big hairy star sits on to of thee.
by Boozie B. August 27, 2009
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Or when you want to hurry up and get a multiple choice test over with and you don't care about the grade. Same as abacadaba
"How did you do on the test"
"I just chrismas tree'd it"
by ArtSeaOne February 12, 2005
a pine tree that you put in your house on christmas hovering between life and death until your brats open their presents and you throw the tree out. You then find pine needles all over the house for 6 months.
I always buy a cheap (christmas) tree.
by Kyle White December 29, 2003
The dashboard of a poorly maintained vehicle when several warning lights are flashing.
Dude, you better check the engine cuz your dash is lit up like a christmas tree.
by Max Debord April 15, 2007
Term used for marijuana after thanksgiving and before easter.
After I got my christmas trees, I rolled a Philly that could'a got the entire neighborhood high!
by DeeJay December 12, 2003
A sex act colloquially referred to as 'decorating someone and lighting them up'. In layman's terms, giving someone a pearl necklace and beating the hell out of them.
Steve came into the office today bragging about how he had given a Christmas Tree to Charlene from accounting. I didn't believe him until I saw the bruises.
by T-Bone Hardy January 24, 2010
1. A tree people decorate around Christmas time.

2.Christmas tree is a song by Lady GaGa, and it is referring to her vagina.

Lady GaGa's Vag.
"The only place you wanna be is underneath my Christmas tree."

"oh oh oh Christmas,my Christmas tree is delicious"

-Lady GaGa
Verb. A practical joke which consists of pressing all the elevator buttons as you get off said elevator. This prank works best when the elevator car is loaded with people, and also if the building you're in has at least 8 floors.
me: I just pissed off Scott.
Nathan: how?
me: I Christmas Tree'd him a minute ago.
Nathan: haha nice.
by Dragomir Andreyevich September 11, 2007

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