/ˈhälə beeˌdā/ - a birthday and holiday on the same day; holiday + birthday; an elite day where a special individual celebrates both their birthday and the holiday that it is shared with; a holiday birthday aka Holi~Bday.
Carmen is celebrating her Holi~Bday on December 25th. You know she's a Christmas baby and loves to talk about receiving lots of gifts for her extra special day. I'm so sick of that bitch bragging about her Christmas Birthday every year!