Brain 

cognitive capability

I did not have enough brains for the sciences.

Brain by Arminkshipper June 7, 2024

brain 

Something that the majority of the human population lacks, despite having evolved to increase its size.

Humanity is quite stupid. This is because TikTok removes people's brains.

brain by HackerDragon9999 May 16, 2025

Brain 

To stab someone in the head.

"Walker, brain it!"

Brain by Jimbojonesjimmy July 5, 2025

Brain-Weasels

Intrusive thoughts of self-doubt and despair, often associated with depression or anxiety, that crawl into your brain and make it hard to focus on other things.

I was going to go to the party, but my brain-weasels were so bad that I couldn't deal with other people that evening.

Brain-Weasels by e.m.b. December 16, 2015

Brain surgeon 

That dude tanisha be fucking with.

Damn bro I didn’t know tanisha was really fucking with that brain surgeon, you think if I got rid of my yee yee ass haircut she’d stop fucking with him.

Brain surgeon by Savage X January 21, 2021

brain sludge 

Brain sludge is where you have so many intrusive thoughts that it completely derails your ability to think or focus.

I took a test today at school and I had a really bad case of brain sludge.

brain sludge by PWS27 May 3, 2017

Brain Fart 

When you mean to do something really obvious but then you forget what you were doing and end up doing something something completely different. i.e, when you have a wrapper in one hand and food in the other, and throw away the food and try to eat the wrapper.

Brain Fart:
Person 1: Man, I had such a brain fart today.
Person 2: What did you do?
Person 1: I was holding food and a wrapper and threw away the food and tried to eat the wrapper.

Brain Fart by nv2001 February 8, 2015