When taken almost literally, it means someone is unintelligent or unequipped to talk to a specific person or about a subject. Although it has ironic connotations to mean that the interlocutor or the person they are speaking with is on another level/wavelength.
Compared to my friend, big brain Bojack, who is simultaneously discussing Kant's Deontology and Quantum Mechanical superposition, I have a smallbrain.
A certain definition for that doesn't happen to be the truth. Certain definitions on Urban Dictionary don't happen to be the truth. Certain messages on Urban Dictionary don't happen to be the truth. A certain definition for that doesn't happen to be the truth. Not "When someone is a small brain they are not smart and have the smallest of brain's" from WhyAPenny. Also not "People with small brain typically are named Roger and Bo" from WhyAPenny. /
that dude over there is a small brain genius, he accidentally poured some substance into whatever tf that is and created it into a new material.he is getting the nobel peace prize rn
Pierson's small brain is another word for a brain that has been deformed. The person with Pierson's Small Brain usually have learning disabilities and wont be able to keep up with the other kids in their school.