Top Definition
Worse than a brain fart, a brain shart has far worse consequences. A brain shart is doing something completely idiotic but in a key situation, or in a way that brings about serious repercussions.
Who can ever forget Chris Webber's brain shart in the 1993 NCAA championship game in which he called a timeout when his team had none, thereby getting a techinical foul and giving UNC the crown.

Because of a colossal brain shart on air in front of millions, Imus is out of a job and out on his can.
by Mavericklax4 April 27, 2007

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Similar to a brain fart, only something nonsensical comes out of your mouth during the thought process (aka a brain fart where a little comes out).
Guy 1(in deep thought): Yeep.
Guy 2: What?
Guy 1: Huh? Oh, sorry... I had a brain shart.
by Joshua Sweeney April 24, 2006

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Similar to the brainfart, it is the inability to even remember the slightest bit of what you were talking about to the point where someone wonders if you *actually* shit your pants while thinking.
When describing his dog, Rufus had a brainshart and immediately went into a 20 year coma.
by Taterbutthole December 27, 2009

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Like a brain fart only worse.
A brain fart is forgetting your wedding anversery when asked.
A brain shart is forgetting you're married.
I had a total brain fart when I thought I forgot where I parked my car. Then I realised it was a brain shart because I don't own a car.
by grogboy June 19, 2016

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