A level of stress where you decide whether to face the situation or just walk away.
I was at a meeting and my colleagues blamed me for something I didn't do. Now I'm deciding whether I should fight or flight.
by Mattdude April 15, 2015
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The stress mechanism that all human beings possess whenever they encounter a stressful situation. This involves chemicals such as adrenaline and cortisol overriding the brain in which the person will either face the situation like a badass, or run away like a total pussy.
*fight or flight in a nutshell*
Person 1: "I'm going to kick your ass for fucking my mother last night." (pulls out bat)
Person 2: "FUCK THIS SHIT I'M OUT." (runs away)
by Dubiks August 26, 2018
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"have you heard of the song fight or flight by conan gray?"
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"of course, I have I love Conan Gray"
by 14plgl14 November 19, 2022
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Fight or flight is the physical reaction of an organism to a perceived threat within the environment. It is an inherent trait found in all animals (including humans) that ultimately promotes the survival of a species (via natural selection).

When the fight or flight response is activated, the cardiorespiratory system is given immediate emphasis while the digestive system takes a step back, thus why one loses appetite during a stressful event. Generally, the organism's body gets prepared to either deal with the threat or flee away from it.

Fight or flight response makes up the first stage of the general adaptation syndrome.
When the tiger pounced on the gazelle, the gazelle's fight or flight response kicked in and is what enabled the gazelle to flee from the tiger in a swift and nimble manner.
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When it is humanly understandable to give up instead of persevering when faced with a false start or failure in solving a math problem—when the pain-and-gain mindset is often missing among struggling or frustrated students, who mistakenly thought that only those blessed or born with the “mathematical gene” could do math.
Fight-or-flight math makes it hard for us to think clearly, logically, and reflexively. Let not negative emotions take control of our reactions.
by Numerati August 8, 2024
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