When someone sits on your ear while you are sleeping and farts. Usually done as sick pranks at late night parties.
Richard "Dude I just gave Brad a Brain Fart!"
George "Dude that's nasty!"
Brian "SWEET jesus!"
作者 Lemon Pie 2008年7月10日
when a computer freezes or starts being dumb. or any one who has a lapse in judgment.
Damn. My computer had another brain fart.

I can't believe Jacob did that. He must've had a major brain fart.
作者 Whoohoo 2007年12月20日
An incredibly bad(smelling)idea that leaks out of someones head, although these bad ideas can be easily avoided through basic common sense, The term "brain fart" is mostly associated with unavoidable bad ideas that originate from a boss or employer.
Bob's boss looking rather proud leaks out a rather large and foul smelling brain fart by telling Bob "you will have two week work deadlines at the beginning, middle and end of each month".
Bob can easily identify this as a brain fart from the really bad smell and since 2 weeks of time would not exist inbetween the end of one month and the beginning of another.
作者 Kuatolives 2007年2月25日
"If Ya Don't Stop Thinkin
Ya Brains Gonna Be Stinkin"
nojjhjhhhhhhh dfdf brain fart. fdf f ffdgfggdggffgffgdf fggfgfgdff
作者 MJ cvghfgjghf 2007年3月24日
Commingly meaning to think of something after the fact for example after a fight or in class with an answer and forgetting
Person 1: oh crap i coulda called him a dickhead
Person 2: wow what a brainfart
作者 jake fool 2007年5月13日
A spontanious thought or creative idea.
We were discussing the campaign when i suddenly had a brainfart.
作者 Keith Wijnkooper 2003年4月09日

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