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the ultimate in hilarious, signified by the special first character, a "G"

1.adjective
a) kelly, that was gilarious!
b) you are incredibily gilarious
c) oh, thats better than hilarious, thats Gilarious!!
gilarious by beingdevious September 27, 2005
Words you can keep
When you giggle because something is so damn hilarious
- gawd he was so worried when I said what I was doing *ghahahagigglemorph*
- so gilarious!
Gilarious by Jedia July 26, 2012
So funny, better then Hilarious - named after Gilly
Thats so funny, better then Hilarious, its Gilarious! Just like Gilly would say.
Gilarious by Kagey38 July 22, 2019
Adjective.
Gloriously Hilarious
Oh my Gawd this book is gilarious
Gilarious by bubblez August 2, 2016

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

Filarious 

when something is fucking hilarious
Alize: Omg did you see Morné's hair today ?
Sonia : Hell yeah, that's Filarious
Filarious by AAAlex April 10, 2013

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'"
More from Urban Dictionary
Acronym, meaning Too Long Didn't Understand
Similar to TLDR
Sister: This meeting was to discuss the rough draft of my essay, where we discussed the subsidiary questions I added in my rough draft. We also discussed the relationship between my main title and the real-life situations I chose to use in my essay. We discussed the structure of my essay as well, specifically the Math AOK section and how it relates to the contradiction of the title. This second meeting was particularly helpful in discussing the implications of my essay claims and how to apply the title across various areas of knowledge. There were many sections of the essay that could have been cut down in wordiness and the ways of knowing required further and more in-depth analysis.

Me: Woah! TLDU!
TLDU by L-Evans January 14, 2019
Word of the Day on August 30, 2026
the act of having anonymous sexual encounters with other men in public toilets.
Cottaging by greeef April 24, 2003
Word of the Day on August 29, 2026

Salad Days 

green inexperienced youthful judgement and cold blooded execution of those judgements.

Rashness with little concern of consequence.

Antony and Cleopatra. William Shakespeare

"My salad days,
When I was green in judgment, cold in blood."

- William Shakespeare, Antony and Cleopatra, 1.5
"How did you end up in jail?"

"Salad days, 'nuf said."
Salad Days by GilbyRFC0 October 7, 2011
Word of the Day on August 28, 2026
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