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1.
A "girl emergency" is a declaration that may suspend some normal functions of the lady in question, alert those coming in contact with said girl to change their normal behaviours, or order agencies to implement emergency preparedness plans.

It can also be used as a rationale for refusing to take the girl in question seriously, even if she guarantees she is behaving rationally. Such declarations usually come during a time of natural or man-made disaster (for example: crushes), or following a declaration of girl-war.

Related: menstrual cycle.
Friend: GIRL EMERGENCY. That'll be the name of the young adult novel written about your life.

me: is this some sort of urban dictionary term of which i'm not aware? Because it probably means pregnancy.

Friend: nope. Not that I know of, anyways. Just the whole: BLUSHING AROUND GUYS! AND MY CLOTHES ARE ALLLL WROOOONG
by profoundlypaige December 08, 2011