Said mockingly to describe people (like politicians and intellectuals) who use double-think, conceptualism and mental gymnastics to convince people of things that go against common sense and their own interests, but can also refer to plans or "solutions" which are unnecessarily convoluted. Usually such plans/"solutions" are intentionally complicated for the purpose of hiding ulterior motives.
"The solution is simple, but these big brained politicians have to make everything complicated."

"You have to be pretty big brained to understand that 1 and 1 is actually 11, and not 2."

"Intellectuals want to implement their big brained plans to engineer society."
by SpermDonor June 8, 2018
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A derogatory term for someone who over-conceptualizes. Who uses intellectualism and mental gymnastics to rationalize the irrational; to justify bad ideas or discredit common sense.

People who put their principles over being practical. Especially when their principles are at odds with the real world. Especially when they spout off their "rationalizations" to others.
We uncultured knuckledraggers just can't get our heads around the ideas that gender is fluid and race is a construct. You have to be big brained to understand that stuff.

Common sense is for common people. If you're big brained enough 1+1 can equal 11, and you should consider it your duty to explain to all the commoners how it does not equal 2.
by SpermDonor June 7, 2018
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A term to describe the most intelectual of individuals.
I have big brain
by rubythekitten19 August 6, 2019
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Something that only the smartest of people and the maddest of lads/laddies have; something you say in the occasion of someone doing something very amazing that requires a high amount of intelligence
Einstein: "I figured it out! e=mc^2!!! I did it! An amazing equation that will have countless applications!

Einstein's Wife: "BiG bRaInS"
by howiemandealt June 17, 2019
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When you do something smart for once in your life. overcome a problem with a good solution
*he punched thorugh his computer screen so they can't check his search history*Big Brain
by Beepers Boop November 10, 2019
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When somebody says something smart or comes up with a good idea.

You use use the term big brain to agree, be sarcastic, or let the person know that they have a good point.
John: “ instead of buying one Small Arizona for 1 dollar you could get two big ones for 2 dollars

Bill: Big brain
by Symbols December 17, 2021
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A time when an idea or an analogy is used tactically.
He plays minecraft instead of fortnite he is big brained
by InkSwarm Nation YT October 27, 2019
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