lizard brain

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

Sexy Brain

When you have a sexy brain, you're extremely smart to the point where people want to sleep with you because of it. A brain can be the sexiest body part if you train it to be that way

She has such a sexy brain!

by GOD517 May 28, 2018

brain-box

Someone who is of above-average intelligence.

"So Ned totally aced his comp-sci 322 exam without even studying. Dude's a total brain-box."

by postModern Savage July 7, 2006

Brain Slushy

The result when a gun is stuck in one's mouth, and fired. A term made famous by 11 year old internet sensation, Jesse Slaughter, and her rant that got her stalked by the web forum 4chan.

"I will pop a glock in your mouth, and make a brain slushy"-Jesse Slaughter

by jesseisqueen July 21, 2010

Smooth Brain

Opposite of big brain. Smooth brain refers to an idiot or someone dumb. Neuroscientists believe the more folds you have in your brain means the smarter you are. Therefore if you are called smooth brain, you have less folds and therefore dumb.

How did you forget to lock the door? Good move, smooth brain.

You don’t know basic math? Smooth brain 🙄

by TheoPham September 13, 2019

Big brain

When you do something smart for once in your life. overcome a problem with a good solution

*he punched thorugh his computer screen so they can't check his search history*Big Brain

by Beepers Boop November 9, 2019

cookie brain

When you eat lots of cookies of too many varieties, and thus require the use of reserve brain power to process said cookies

Person 1: i don't know i just say things, particularly now in my compromised mental state.

Person 2: sleep dep?

Person 1: in addition to cookie brain.

by Zipline Pro December 16, 2010