Peanut brain 

A phrase in which CS:GO professional players yell at a player who does something stupid or whiffs every shot.

Did you see what tarik did? He is such a peanut brain

Peanut brain by XEQUIT10 June 1, 2018

peanut brain 

A dumb-ass who is incapable of understanding basic concepts that come naturally to the majority of the developed world. An individual whose IQ is within 10 points or above 100.

That peanut brain called a timeout even though they had none left.

peanut brain by sandlot03 March 3, 2021

Peanut sized brain 

A stupid, dumb idiotic person who either is one of the stupid 4 year olds who stare at cocomelon on their mothers phones all day, or idk, something.

That person has a Peanut sized brain!

Peanut sized brain by Your mum is gay lol October 14, 2022

Peanut butter brain 

To be tied, confused l, or in a daze

I'm so tired that I have peanut butter brain.

Peanut butter brain by Alec Nicks February 14, 2023