Top definition
When one's birthday is celebrated for eight days. This usually occurs because your parents are too broke to buy you a present on your actual birthday, and payday occurs later in the week.
Kid: How come I am only getting my cake today?

Mom: Baby, it's your birthanukkah! We will have cake today, there will be presents on Tuesday, and we can go out to eat and go bowling on Thursday!
by lawn_mama January 27, 2008
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