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that part of the brain that senses danger, where instincts and gut feelings originate; primal thoughts; subconscious or involuntary processes; the amygdala
"Dexter" Season 5, Episode 7:
Lumen: I just had a feeling. Some sort of lizard brain thing.
Dexter: She's starting to sound like me.

"Dexter" Season 7, Episode 3:
Deb: How do you know he'll kill again?
Dexter: An alarm is going off inside my lizard brain.

"Fool Moon - The Dresden Files, Book 2" Chapter 15:

"I could have sworn I saw her face start to change, her bared teeth begin to grow into fangs. Maybe that was just the effect of the magic on my perceptions, though, or a primitive, lizard-brain sort of reaction to Tera rising to her feet and charging toward me with a howl. There was murder in her eyes. I hadn’t gotten beaten up twice, shot, and nearly strangled to get taken out by a misguided werewolf bitch."
by lizardgirl October 30, 2012
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May 11 Word of the Day
A euphemism for β€œkill me” now that composting oneself after one’s death has become popular.
All right, why don’t you just compost me?
by Dr Bunnygirl March 22, 2020
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2
The act of becoming so high that you act on only natural insticts.
"Mannnn I was tweaking after that first blunt but after the thirteenth I was lizard brain"
by SCarter October 27, 2007
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3
The disconnection one feels from being in a state of lacking (typically physical needs that throw off homeostasis) in times when needed to perform.
Hunger, fatigue, dehydration and other symptoms in the body can lead to feeling like a basking lizard on a rock.
Signs of Lizard Brain include but are not limited to: disconnected speech, idle thinking and stillness, stumbling on words, intense desire to hunt for food or water, prolonged closing of one's eyes yet staying awake, and being drawn to warmth. Signs typically improve after acquiring one's needs and the ability to focus on the task at hand returns.
"Dude, I drank way too much last night and I am really out of it today."
"Go get some water to shake off that lizard brain. You are obviously thirsty and we need to get this project submitted."
*one trip to the water fountain later*
"Alright, thanks. I needed that. What's next?"
via giphy
by SilentHound216 February 19, 2021
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