The tradition is that the "birthday boy" or "birthday girl" should fill their mouth with as many long noodles as they can and then eat them.

传统是“男寿星”或“女寿星”应尽可能往嘴里塞满面条，然后吃掉它们。

youdao

Mom: Sure, as you wish, birthday girl!

妈妈：当然可以，小寿星，随你所愿。

youdao

How 'my birthday girl?

怎样'我生日女孩？

youdao

Oh, in fact, the girl that she was tutoring was having a birthday party or something like that...

哦，其实，她教的那个女孩当时办了生日聚会或是类似的活动……

富家孩子的生日 - SpeakingMax英语口语达人

Ron McClary provides a solid presence as bartender Herman, and Margot White is morosely funny as recently dumped birthday girl, Myrtle.

WSJ: Review: 'Happy Birthday' a booze-filled romp

The dapper jeweler, ever discreet and always the consummate salesman, breathes no word of the birthday girl's earlier visit to his store.

FORBES: Magazine Article

But the real birthday girl is Addie, who finds rebirth and new resolve to take charge of her life during the course of her blithe adventure.

WSJ: Review: 'Happy Birthday' a booze-filled romp