hilariopus 

something so hilarious that it needs 8 tentacles to contain its hilarity. also used as a synonym for "mad funny" or "extremely hilarious"

dude that movie was fucking hilariopus

hilariopus by octolarious October 19, 2009

hilariopus 

Adj, Mostly synonymous with hilarious or hilarioose or hilario but implies stronger feeling- MORE hilarous than hilarious things.

Word developed to refer to the hilarity being supported by the world's Octopus population (cue the 'Pus' ending), and as we all know Octopi are serious critics when it comes to comedy- so it must be fucking hilarious.

1) "Dude, that new stand up is hilario!" "Naw man, my octopus loved him too- hes HILARIOPUS!"

hilariopus by Fiobabyfizz March 1, 2009

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