-the state of being in awe of an hilarious act or happening.
Rebecca: Cindy, is a snob and a 1/2. Good thing she's gorgeous enough to get away with all of her dirt!

Rodney: You mean used to be.

Rebecca: Used to be?

Rodney: Yea. You didn't hear what happened? So, Cindy fell down the stairs broke three teeth and four vertebrae? Yikes.

Rebecca: Muahahaha. I can't stop laughing!!! Its hilarious!!!! I'm in a state of HILARIUM!!!
by Gorgeous Melanin January 29, 2011
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a "HILARIUM" is a word to describe the space and time within which hilarious shit reveals itself.
The point in Dave Chappelle's "Black White-Supremasist" skit, when his character Clayton Bigsby removes his hood, and the dude in the back row...his head literally explodes...then Clayton offers everyone refershments....that is the absolute HILARIUM of life.
by Tehn Diamond August 23, 2010
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1. An event of hilarity.
2. Something extremely funny.
"That was a 'hilarium!'" said Tuan, as he watched the late night comedy t.v. show.

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something that is extremly funny
yo, guy that's hilarium!!
by nerds June 25, 2003
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Everything that is hilarious or at least mildly funny.
P1: What's in his profile?
P2: Hilarium.
by Emma Demma Ding Dong November 6, 2003
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1. An object or idea that puts one in a state of hilaria.
Tym Zero: Why do rednecks like butt sex?
Hikaru Zero 256: dunno
Tym Zero: because they can watch nascar at the same time
Hikaru Zero 256: haha ... that's a good hilarium
by Hikaru Zero August 14, 2003
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