look up any word, like fleek:
 
6.
A note that cuases an uncontroleble bowl movement. Said to be 2 octevs below middle c on the recorder. I play the french horn which in translation would be 5 notes bellow my low F.
I was practising dark adventures, when I dicesdid to experment with the brown note. Well I wound up with a bounch of tollet paper and soild my new boxers.
by Master of puppits March 02, 2006
 
1.
As referenced in South Park, a low-pitched sound that can cause someone to crap their pants. May also be used to refer to any infrasound note that can create disorientation, nausea, etc.
I'm not so sure using the brown note on those protesters was a good idea. They're still rioting and now they smell like they need a diaper change.
by Brian X July 04, 2004
 
2.
The name for a fictional/hypothetical sound frequency (or pitch or note) having the property that it causes loss of bowel control, and thus involuntary defecation, in humans. No actual note/sound frequency having this property has been identified as of May 8, 2008.

The term is distinct from "brown noise". In science, Brownian noise, also known as "Brown noise" or "red noise", is the kind of signal noise produced by Brownian motion. An example of Brownian noise is the sound a television speaker makes when the screen goes to static.
An article about the failed search for a "brown note" appeared in the Annals of Improbable Research.
by Keeps.making.sense May 08, 2008
 
3.
An extremely low frequency sound that causes Democrats to lose control of their bowels.

This refers to the January 19, 2010 US Senate election in Massachusetts to fill the seat vacated by the late Ted Kennedy. Republican Scott Brown convincingly defeated Democrat Martha Coakley, who was overwhelmingly favored to win in a state that had not elected a Republican in 40 years.
When Martha Coakley lost the 2010 US Senate election, every Democrat in America heard the Brown note.
by WHOSYERDADDY January 20, 2010
 
4.
A female who seems attrative under a drunk man's eyes, while in reality, shes just plain ass ugly.
"Dude shes brown-note..you're so drunk"
Andrew:"Sam, don't A-sqaure me get the fuck out of here.."
Sam:"Shes brown-note, i just saved your ass."
by Sam Zgi January 14, 2008
 
5.
a low octave sound above low E# that causes eratic bowel movements. lick my balls
I heard the brown note and shit my pants.
by bread infection October 22, 2005