Also called the UG. A message board forum for MMA (Mixed Martial Arts) fans and fighters. Members often refer to themselves as UG'ers. Contains many UFC and PrideFC elitists/nuthuggers that hate TUF noobs(new fans due to The Ultimate Fighter Reality show). Members tend to belittle others for liking certian fighters, or for not knowing who certain figters are.
There are different levels of access to the forum, a free or MUDNAMER account and a Pro account(blue, green, red name)which costs $$.
Mudmaners usually get shit on by the Pro UG'ers for not buying a name (forum namism if ya ask me).

Ban this mudnamer, The UnderGround doesnt need anymore TUF noobs.
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Un•der•ground (un’der ground’), n., adj.

1) A genre in music and other forms of media intended for an elite audience, that is often characterized by its high levels of originality and experimentation, and does not conform to typical standards, trends, or hypes as set by the popular mainstream media.
The mainstream media has a tendency to steal new ideas from the underground.
by Essix April 16, 2005
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A movement or a group of people related to music, who do it not for the money, the notoriety or the fame, but for the love. They don’t promote, because they don’t crave popularity. They also don’t need to tell everyone about how underground they are because they aren’t really interested in labelling their own movement, they just do it, and if people enjoy it, great.
You ain't underground, you have a Facebook page advertsing your event fella....
by dandesqueran June 6, 2015
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Art, opinion or organization that exists outside of mainstream society or culture. Also known as "independent" or sometimes "counter-culture".
Giff preferred the underground music scene in her area to the bland stuff that played on most radio stations.
by Gyro June 9, 2002
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The London railway system. Also called the Metro or Tube.
We took the Underground from King's Cross to Covent Gardens.
by Zen84 December 1, 2007
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The act of connecting with the Earth through dancing barefoot to underground electronic music such as house music or techno, at an outdoor electronic music festival or gathering. These particular "roots E.D.M." genres of House and Techno use a 4/4 beat, a.k.a. "4 on the floor," the exact rhythms our ancestors produced through primitive percussion instruments created from trees and earth clay, which they used to dance barefoot upon the earth in celebration, worship, prayer and to connect with themselves, each other and Nature. Our ancestors did this for tens of thousands of years, and many indigenous communities around the world still do this today. See shamanism as well.

Derivative of the word "grounding" or "earthing" which has been trending since 2015, describing the act of standing or walking barefoot on the earth to absorb ions, connecting electrically to the earth; reducing inflammation and improving health.

*First coined/introduced by Elektrik Fantasy Festival in Miami.
I've got my Fantasy costume together and I'm ready to dance to some 4-on-the-floor house music at Elektrik Fantasy Festival, but I'm going barefoot because I'm all about the undergrounding on the sand!
by fAB eLEKTRIK March 5, 2018
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Underground is about passion. of course the word is missused and abused . a true underground artist will create music/art from the heart as apposed to something tailored to a commercial market.an underground event organiser will still put on the event for the love of it even if its going to lose money... underground artists can have a long career out of the often distructive gaze of mainsteam media and earn money which is closer to someone with a good job than the millions of there commercial counterparts. where as a commercial artist will probably have a short shelf life
"I have been buying his records for 15 years, a true underground artist"

"whatever happened to him , last year he was on every tv show , radio station and all the teenage girls had his tee shirt"
by from the heart June 13, 2007
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