The period from about December 20th - January 5th in which a person's birthday may fall and they get a "Christmas/Birthday Present". I.E. They get one present for their birthday and Christmas instead of two due to their birthday falling so close to the holiday.
I got screwed again on presents this mom decided to get me a birthmas present to make her holiday shopping easier and cheaper.
by NEPA Diva December 28, 2009
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The (lame) double gift. Usually for a person unfortunate enough to be born on or around Christmas.
I was born on 12/23 and never get separate birthday and x-mas gifts. I always get some lame birthmas gift.
by BuddhaBrother June 28, 2005
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-The date of a persons birth.
-Another word for birthday.
Merry birthmas to me!
by daymare June 12, 2005
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The birthday of a person that happens to coincide with December twenty-fifth, or Christmas day.
Jeremy is one of the few people I know who has a birthmas.
by Alcabum November 16, 2009
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When a family is poor and can't afford presents for birthday and Christmas so they get them one present for both.
Tyler's parents give him a birthmas present every year
by Collkid69690 December 23, 2014
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A generic greeting used for those (un)fortunate enough to have their birthday on December 25. Usually followed by: "I would've gotten you two presents, but..."
Person 1: Hey man, Mappy Birthmas!

Person 2: Aw thanks dude! Now, what did you get me? *evil stare*

Person 1: Well, I would've gotten you two presents, but...

Person 2: Ugh! This happens every year!
by Aussie Rhys December 25, 2009
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A term describing a Birthday/Christmas gift for someone who was born on Christmas Day when someone gives them one gift to serve as gift for both occasions. Usually a cheap way to get out of having to buy two separate gifts.
"I get ripped off every year! I always get a Birthmas present instead of Christmas and Birthday presents since I was born on Christmas day!"
by Alilrebelchick February 23, 2010
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