fatal hilarity 

death as a result of laughter

In the third century B.C. the Greek philosopher Chrysippus died of laughter after giving his donkey wine, then seeing it attempt to feed on figs. This is fatal hilarity.

fatal hilarity by Darling Ama December 4, 2006

Hilarian 

Someone who is being hilarious

Your Hilarian!!!

Hilarian by Bdog-Dattis July 29, 2009

hiLARious 

funnier than the norm. in fact, funnier than just plain olde 'hilarious,' because you took the time to capitalise the letters L-A-R to emphasise the second syllable.

pronounced: hill LAAAR ee us

did you see the new cheat commandos? the one with 'commandos in the classroom?' it's hiLARious.

hiLARious by elemental September 30, 2005

fucking hilarious

Something that is as funny as midgets fucking

Urban Dictionary is fucking hilarious

fucking hilarious by JPWHITS July 14, 2004

hilariou5 

Being hilarious to the point of geekiness.

OMG, Mike! You are teh uber hilariou5!

hilariou5 by Scary Uncle Devin December 14, 2008

hilaritized 

Laughing so hard that one is unable to move and (in some cases) breathe. Similar to traumatized and sodomized.

After the practical joke, I was so hilaritized the cops had no trouble arresting me.

hilaritized by Joseph Frederick October 7, 2007

Hilarilol 

(i)A mixture between 'Hilarious' and 'Lol' (ii) Most commonly used to describe something that is too funny to just be 'hilarious' or 'lol'

(i)John: OMG, did you just see that nigga get capped
Dan: Yeah, t'was hilarilol
(ii)John: Dan, are you going to finish your business coursework?
Dan: Nahhh, watching Brad get screamed at is just too hilarilol

Hilarilol by Badman94 July 18, 2010