is a rule which states that any conceivable thought which ordinarily could be summoned has been lost and has become irretrievable. A complete blank.
He just completely went blank in the middle of the speech. He couldn't say a thing. Musta had a quantum brain fart.
by OMGR8US October 8, 2012

1. Someone who's head is devoid of nominative brain tissue. Similar to the more common air head the cranium of the subject contains nothing but gas. However in this instance, the gas inside the cranium consists mainly of stinky gut methane.
2. Someone who consistently brain farts.
2. Someone who consistently brain farts.
"I admit that I slept with your best friend, honey but honestly, it didn't mean anything."
"Why don't you just fart off, fart brain?!"
"Why don't you just fart off, fart brain?!"
by deadestfish May 3, 2009

a brief mental blank when attempting to pick out an outfit, complete forgetfulness of one's own ability to put an outfit together without mental strain.
I've been looking through my closet for hours and I still can't find anything to wear - I'm having a total fashion brain fart!
by misslaurendeane November 29, 2021

I was grocery shopping with Brain, and he accidentally let out a fat one in the canned beans isle. I yelled out “BRAIN FART!”
by The real Londigo June 30, 2024

Brain fart- also known as “fartus brainus” is very common around students, who study math, physics or chemestry. It’s caused when you’re brain does not know what to do aka it’s about to explode. Treatment: give up or go to sleep
by GeDollar November 9, 2017

by _.duhitsme._ August 10, 2016

something that you know how to do, but temperarly forgot.
or you just got a brain fart because you wernt thinking clearly.
or you just got a brain fart because you wernt thinking clearly.
by crystaldreamer12 September 16, 2021
