by KigiWigi December 10, 2008

Big-brain, (Which can also be spelled without a hyphen,) means smart, intelligent, and is usually used when someone says something witty in an argument.
by ~Chrysanthemum~ December 2, 2020

A big brain is a brain that only big brains can handle.
Only a few people have big brains, therefore they're genius.
Only a few people have big brains, therefore they're genius.
by shoulder pain sufferer October 26, 2019

Jules: You know what they call a Quarter Pounder with cheese in France?
Brett : No.
Jules : A Royale with cheese! You know why they call it that?
Brett : Because of the metric system?
Jules : Check out the big brain on Brett! You're a smart motherfucker. That's right. The metric system.
Brett : No.
Jules : A Royale with cheese! You know why they call it that?
Brett : Because of the metric system?
Jules : Check out the big brain on Brett! You're a smart motherfucker. That's right. The metric system.
by dlicen August 10, 2022

Usually retarded people that thing their smart but their not. They usually have small brains and just say they have big brains to make themselves feel better.
by gamergurlbathwater420 November 18, 2019

by The_crazy_jazzy September 29, 2019

by Brcvpa February 22, 2021
