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A person who has had so much alcohol that they pass out within a short time of partying. The gender of said partier does not matter, nor does it matter if it's the person's birthday or not. Basically being really, really fucked up.
1) A. Woah there, why are you carrying Jarrett out of the party already?

B. He went into birthday girl mode real quick tonight, sorry guys.

2) A. Hey Cody, nice win for the football team huh?

B. Hell yeah bro! Parties are going to be sick! I am definitely going birthday girl tonight.
by Moosenman December 21, 2012
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Apr 22 Word of the Day
When you eat dirt for the first time and leave your family to build a shack in the woods
Bro since I got dirtpilled on Tuesday I have made sooo many worm friends and made them soo many little houses to get married in. Me? Lonely? No you’re the lonely one u lawn owning freak
by ecogoth December 30, 2020
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2
a girl at a party who purposely stands out and expects you to supply her with gifts and alcohol.
Amber was obviously the birthday girl that night.
by jen canary April 06, 2008
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3
A girl who is celebrating her birthday. She is given special treatment for looking sexy af and partying hard.
Guy 1. Ally is looking super cute!
Guy 2. Ya man, she is the Birthday Girl.
by Xxfuturexx September 04, 2018
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4
A girl who will have sex with anyone
"Girl, you shouldn't be handing out cake like it's everybody's birthday. Don't be a birthday girl!"
by DaRealist September 19, 2014
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