n. A massive, horrible release of stupid that is often offensive to the senses and may create a social faux pa in some settings. Brainfarts often result in an intense feeling of embarrassment and shame compounded by an inability to explain what the hell just happened.
I was supposed to call Roy Blount, Jr. for an interview at 10 a.m. PST, but I had a brainfart, forgot how to tell time, and managed to call him at 6:00 a.m. PST. I feel like an idiot.
by MadisonU November 12, 2008
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A gap, interruption, or uncontrolled shift in a chain of thought resulting in a lull, pause, and/or blank stare during oral communication and sometimes involving the loss of short term memory.
Everyone at the meeting waited for Jim's response as he finally snapped out of his odd gaze into an unseen abyss. "Sorry", he said, "I just had a brainfart, what were we talking about?".
by ExecuMutant August 26, 2006
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A spontaneous stupid (Stupid the noun, not stupid the adjective) usually accompanied by loss of train of thought and saying something fantastically stupid without realising it.
"Hey, what are you doing?"
"Hold secondary fire and the screen will change"
"What the hell?
"?? Oh, uhh... brainfart"
by Vor the Mighty March 9, 2004
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The sudden stop of brain function in an extreme moment of need.
The student suffered from a severe case of brainfartitis during his presentation in Dr. Bradford's class.
by Dr. Dick Stationary November 20, 2011
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Adj. Used to describe a temporary loss of short-term memory.
I was about to answer her when I suddenly had a brainfart.
by Frank Wilson September 11, 2002
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1. When someone knows how to do something right but at that instant he does it wrong even though he is pro at it.

2. When someone is thinking of saying/doing one thing but does the other.
*You are driving on the freeway and you knew you shouldve takin the 110N exit but you took the 110S for some reason*

Your friend: Dude I thought you knew you had to take the 110N
YOU: Ya I did, just had a freakin brainfart.
by Abdel Hafiz January 6, 2008
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When you say or do something stupid, your brain has had a brainfart.
Person A: Hey, switch on the TV, this show is annoying.
Person B: Switch it ON?
Person A: No, I meant off... I had a brainfart.
by Jerrika12 December 23, 2014
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