Hilarkous 

Often, whence typing the word "hilarious", one is so juiced that the common error of replacing the "i" with a "k" occurs, creating hilarkous. You know that something is especially comical when hilarkous is used in type.

LL: dude i know
LL: that's why i get the small skis
Lindsay: yours were for a midget
Lindsay: hilarkous

Lindsay: dude
Lindsay: new flight of the conchors = HILARKOUS

Lindsay: AHHHHHHHHAHAH SWEET JESUS I cannot breathe right now, I am about to poop my tights, this is the most hilarkous shit I have ever heard.

Hilarkous by TheRealMelG March 20, 2009

Hillryous 

Something so stupid it’s hilarious

Nah it’s so stupid it’s hillryous
“Yo guys that was ✨** h i l l r y o u s** ✨”

Hillryous by MurderRabbitsCult October 18, 2021

Hilarious and original 

A reply to a post online that is so overused it is no longer funny, hence the intense sarcasm in both words

Post: Ayy lmao
Reply: Hilarious and original

Hilarious and original by Mary Beth Sue April 24, 2016

Mentally Hilarious 

A 'better' alternative to using the word 'crazy' or 'insane' to someone. Or just a fun way to call someone crazy. Also, 'mentally jolly' can be used. From the Family Guy episode 'The Fat Guy Strangler'.

"Dr, is my brother really insane?"
"Mrs Griffin, we don't use the word 'insane', we prefer the term 'mentally hilarious'"

Mentally Hilarious by scarlett_sweeney September 1, 2009

hilarimous

hilarimous comes from the word hilarious, but it is even funnier, usually used sarcastically

hahaha, man! that's hilarimous :P

hilarimous by nate February 25, 2005

halarious

The way far too many people spell "hilarious." It is definitely one of the most popular misspelled words in the english laguage. "Halarious" is how most people pronounce "Hilarious" in every day speech. This is the root of the word.

An IM conversation:
-------------------------

Joe: "Dood thatz halarious"

Grant: "No dude, it's your typing that's hilarious."

halarious by Cody Murray August 9, 2006

hilariousaurus rex

When a person laughs hard enough they pull both wrists to their chest and open their mouth while rocking back and fourth but stay in their own personal space. Similar to a velocilaughter.

That girl was laughing so hard she was doing the hilariousaurus rex

hilariousaurus rex by FAKmyself August 11, 2016