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The type of music that started as a subgenre of trance and is still considered so by many people. Trance fans usually call is happy hardcore. However nightcore fans prefer to not be associated with trance and don't like the idea of naming a "nightcore" as anything else.

Nightcore is characterized by a sped-up melody (sometimes), fast rhythmic beat (usually), and ALWAYS higher than normal pitch. Almost all nightcore music are original songs nightcored (remixed into nightcore) by nightcore fans.

Very popular is a belief that nightcore is a nickname of a person who remixes the songs. In reality anyone who knows how to use a computer can nightcore a song and upload it on Youtube.
"Do you like trance?"
"No."
"So why d'you listen to it all the time?"
"I don't!"
"But even right now you're listening to happy hardcore!"
"It's called nightcore!!"
by nightcore_fan June 18, 2010
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Genre that originated from trance and/or techno, and eventually got a life on its own.

Pure Nightcore: VERY fast beats (sometimes so extremely fast, that you cannot count them), and very high pitch (almost chipmunks). Song usually lasts about 2 to 3 minutes. Often described as "cute".
Example: Kiss me by Schule321

Bass Nightcore: fast beats, the main melody (and voice) are pitched up, but there's very low bass added; so the contrast between very high and very low is created.
Example: Kiss me by GrizzNightcore

Trance Nightcore: fast beats, high pitch, but less signing and more melody; filled with repetition; very often there is only one verse or a sentence that is repeated throughout the song. Usually it lasts at least 5 minutes, often more.
Example: Kiss me by Nightcoremania
It looks like nightcore is getting more and more popular in these days.
by Goodnight_core April 21, 2011
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Almost always refers to a song that was initially trance or dubstep, sped up to the point where the lyrics sound like they are being recited by a hurried chipmunk, featuring a strong beat which is is audible but barely discernible. The song is then posted on YouTube, usually giving no credit to its initial creator, accompanied by a visual of an anime girl (or multiple anime girls).
"Back in my day we used to play 45RPM records at 78RPM just for shits and giggles, but nobody ever called it nightcore."

"I used to listen to music while I was on speed, but now I quit the speed and just listen to nightcore instead."
by longest johnson November 07, 2012
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1) A trance music duo consisting of Thomas S. Nilsen and Steffen Ojala Søderholm, started in 2001

2) A glorified term for one of the laziest forms of remixing: speeding up a song and pitching it up, which takes 30 seconds in Audacity. It comes from people trying to emulate Nightcore's style.
Nightcore is awesome, if you're talking about the music duo. If you're talking about the lazy remixes, then nightcore is trash.
by RandomMusician June 19, 2014
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An awful "genre" of music that weaboos use as an excuse to sound creative or interesting. In reality, it's usually some j-pop or mediocre song sped and pitched up, then posted under the youtube name "kawaii san 43795." Once they have graced us with their creation (along with half a dozen sonic Oc's), they proceed to disprove Christianity in the comments section of a linkin park video.
Filthy Weaboo: I love you chinchin chan. I wrote you this song so you will be my waifu. It's a carameldansen nightcore.
Waifu: drink bleach.
by Anime hunter)69(weaboo killer September 30, 2015
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usually "nightcore" is taking a good or a semi-good song, speeding it up and putting it in a higher pitch and then putting a techno beat on it. then you put your name on it because your a "music artist"
"nightcore creator" - check out my new song "Blue Nightcore - If I Die Young"
"random victim" - DUDE! you just ripped of The Band Perry
"nightcore creator" - no this is my original song, cant you see how creative i am?
"random victim" - *facepalm*
by Laffy98 February 17, 2014
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A sad excuse for a genre of music.

Nightcore is a genre of music mostly made up of sped up songs, such as good music from the band "groove coverage" wich the "Nightcore" versions have more views than the originals.

A "Nightcore artist" uses programs like windows movie maker, or camtasia studio to add a picture of what is usually a girl from a japanese anime, and they speed the music up a bit and call it original and a "remix."
by The_Dank_Memelord January 07, 2016
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