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 year...my 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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When your birthday is so close to christmas that people give you one gift for both occasions.
Harry Birthmas! I'm too lazy to give you two different gifts at two different times.
by Nosila November 9, 2010
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