Small brain 

Someone that lacks intelligence. Typically someone named Noah

Oh my god man you’re so small brain

Small brain by -Pussyslayer696968696868686 March 15, 2019

Small Brain 

Someone who is dumb as fuck and has no culture. This person has almost always never gotten laid and eats apple seeds everyday.

Small Brain Human: How do apple seeds go up the tree?
Big Brain Humans:🤦🏼 ♀️

Small Brain by *rebuilds dick* December 10, 2019

Small Brain 

When people have a small brain, they are not smart. In comparison, their brain is at least 2 times smaller, but in rare cases can be even smaller. Small brains usually: are brown haired, play volleyball, have a twin, named Madison.

Who’s that?
Oh that’s Madison, she’s a small brain.

Aw, poor thing.

Small Brain by NotEllieTalbot November 15, 2019

small brain 

You.

Did you seriously mess up the cobblestone generator again? You're such a small brain.

small brain by [insert clever name here] February 18, 2020

Small Brain 

"Small Brain" is an insult that implies that the person it's being attributed to has a small brain

That was small brain move, Ryan.

Small Brain by Limess January 1, 2020

small brain 

when ur dumb

i had a small brain when i did a test

small brain by shit words September 10, 2020

small brain 

A person called Natalie

Natalie is a small brain

small brain by Cat man 420 March 10, 2020