Originating from pewdiepie and cinnamon toast Ken's minecraft skyblock letsplay, this is used in situations where one individual does something profoundly easy after struggling, or just want to sarcastically talk about their IQ being high while doing small brain things
*Pewds and Ken finally make the cobblestone generator*

Pewds : Big brain!!
*cobblestone generator breaks*
OwO
by Nineyearold123 August 9, 2019
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Where you either have a deep thought or had a smart moment.
Man: when you leave your shirt out, does that mean your tucking your pants into your shirt?
Guy: wow. That's a big brain moment.
by Jonathangg November 2, 2019
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when someone is so stupid theyre actually smart
person 1: omg this isnt a table its a window omg
person 2: big brain
by chingchongyouhaveasmalldong October 15, 2019
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Either your IQ is 100000 And you came up with a really good idea or Your IQ is 1 and you tried to be smart and you failed
Karam:I'm Big Brain

Everyone:Epic
by aRandomNoob7 November 16, 2020
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Sarcastic reference to people especially politicians, journo's, pundits etc who profess to great wisdom and use college words to show how smart they and how dumb the rest of us are.
Listened to some big brained nibba on the TV last night explaining that boys are better at Physics cos they have willies and are used to handling the fluid dynamics of their urine. Tosser
by FashyKen October 5, 2017
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