hilariouser 

the comparitive of hilarious. showing that something is more hilarious than what it's being compared to. It was started in new york city.

John is hilariouser than Jane. His jokes are funny but she's pretty dull.

hilariouser by jwatson9229 June 17, 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

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

Dupa Hilarious Eats 

when you eat some really good food.

Max- Bro that shit was Dupa Hilarious Eats.
Andre- We need to come eat here more often.

Dupa Hilarious Eats by Salamiboy69 June 26, 2017

unintentionally hilarious 

Adjective: description of any expression, statement or definition which, although originally intended in earnest, results adversely in humorous disdain.

"Wendy's attempt to explain how her underwear ended up in the frat house rec room was unintentionally hilarious."

unintentionally hilarious by speedog April 28, 2010

hilarious 

Quite funny. Generally used when making fun, or talking about making fun of other people.

Ben H's face is hilariously ugly.

Wasn't it hilarious when Ben H's mom slapped him for being so ugly?

hilarious by NotCharles March 2, 2005