A hard song in the video game In The Groove, rated as 12 blocks on expert. The composer is Smiley, a pseudonym of Kyle Ward, the main music composer of the In The Groove series. The stepchart features many 16th note runs near the end of the song. The BPM is 163, though it briefly increases to 279.5 during the middle of the song.
Those 16th note runs near the end of Delirium killed me!
by JasonMath October 18, 2006

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Top Definition

1. Temporary mental disturbance: A state marked by extreme restlessness, confusion, and sometimes hallucinations, caused by fever, poisoning, or brain injury.

2. Great excitement: A state of extreme excitement or emotion.

Delirium of joy.

(It's pretty much the same as dilirious.)
by Jafje April 03, 2007

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Trauma of various degrees resulting in confusion, hallucinations, and speech impediment ions; To be delirious.
The sight of something horrible plunged Ted into a state of delirium.
by LORD HELL FEAR BLOOD March 17, 2003

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A hard in the groove song full of 16th notes that's 140 BPM and a 12 on expert.
Delirium expert is impossible to pass!
by 5'11"Racer October 01, 2006

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see troll and fgt.
Damn, he's a big DELiRiUM!
by CorporationX November 09, 2004

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