The acceleration of typing speed but deceleration of the accuracy in the words , content and context while texting due to thumbs fatigue although thought flows are exponentially high. Also known as FBST syndrome.
I was texting this girl come over to my room but instead I got hit with Fast Brain Slow Thumb syndrome and wrote “Come Over my hoes” so I blew my chances.
by Sassy Sheesh November 24, 2021

Adjective. Causing pain or discomfort to the brain.
Also noun. An object or experience causing pain or discomfort to the brain.
Also noun. An object or experience causing pain or discomfort to the brain.
"that exam was brainful..."
"Jamie gave me a right brainful last night; he just would not stop talking"
"Jamie gave me a right brainful last night; he just would not stop talking"
by Aconymous June 10, 2023

A term used to describe someone who typically tries to turn any slight disagreement, conversation, argument, etc. into a full blown debate session. Often to the point of coming off as a pretentious dork and an asshole.
“Dude, everyone likes Coke over Pepsi. It’s just better.”
“You are using a bandwagon fallacy.”
“Holy debate brain.”
“You are using a bandwagon fallacy.”
“Holy debate brain.”
by r7949393727274 June 6, 2025

Whenever your brain just stops to function for a hot minute
John: hey max how are you?
Max: Hey max I'm good, how are you?
John: did you just great yourself?
Max: I'm sorry my brain farted I couldn't think straight
John: hey max how are you?
Max: Hey max I'm good, how are you?
John: did you just great yourself?
Max: I'm sorry my brain farted I couldn't think straight
by Max & John Explain April 19, 2021

When your thoughts are all over the place and/or you are dissociating. Seen in neurodivergent people, and high people.
Friend one: Got space brain today
Friend two: Mood
Friend one: I didnt know you smoke weed too
Friend two: Oh. I just have ADHD
Friend two: Mood
Friend one: I didnt know you smoke weed too
Friend two: Oh. I just have ADHD
by Call me ur dad April 7, 2022

A symptom associated with an alcohol hangover when one turns their head faster than the brain can process what the eyes see, causing delayed disorienting vision.
Oh man I need to sit down. I drank too much last night and when I turned around just now Compass-brain almost made me fall down.
by Crystal Methany May 22, 2017

Usually, somebody under the influence of cannabis. You can’t even remember a thought or idea from five minutes ago. Or, if really toked up, like one minute ago.
I had a great idea for an invention when I smoked this Ghost Train Haze cannabis, but my playdough brain is failing me and I can’t remember jack shit.
by Purplenado March 5, 2023
