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X-Day (the SubGenius rapture), voted Time Magazine's 'Scam of the Century', was supposed to have swept the SubGenii from the earth on July 5th, 1998. This was a faith-shattering event for many x-ists, who were not loaded into the pleasure-ships filled with sex-goddesses. Though it hasn't stopped the SubGenii from gathering every subsequent 5th of July devivals, in hopes that they may have been off by a few years.
I hope that there's a lot of bug-porn on those pleasure ships, come x-day.
x-day by SuBsTaNc3 May 29, 2004
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Originally July 5, 1998, but turned out to be 8661 instead.
X-day by Anonymous May 22, 2003
A two volume Japanese comic book about four people and their plot to blow up a highschool. See manga.
Did you think the second volume of x-day was a letdown?
x-day by Abby February 2, 2005

Tes X Day 

Tes X Day is the day where fans celebrate up and coming artist ‘Tes X’ This Holiday is celebrated on September 3rd which is Tes X’s Birthday
Fans celebrate Tes X Day every September 3rd
Tes X Day by A0523 September 2, 2021

Booty S*x Day 

Booty S*x Day, Meet a stranger and have anal sex with them.
Stranger : Hey!
Person : It's October 8...
Stranger : Booty S*x Day???
*booty sex*
Booty S*x Day by BigBootyCheeks June 18, 2022

X-Boxing Day 

It is the one day over the Christmas holidays where you are entitled to uninterrupted X-Box entertainment without the apprehension of having to switch it off.

This remarkable day occurs either on Boxing Day or on some other agreed day with your spouse.

Whilst it is lovely spending time with family, this is an effective pragmatic settlement that helps to soften the unpleasant experience of unwillingly enduring dreary Christmas TV, imposed through common family demand.
"I hear you are not spending Christmas at home this year, is there any chance you could jump online for some Special Ops?"

"No, but I do have an X-Boxing day agreement. Unfortunately I am ill-fated to be in an unfamiliar habitat during Christmas, but Knowing X-Boxing day is nearing whilst I respectfully give my support to another’s customary routine, is especially reassuring."
X-Boxing Day by coin-op December 22, 2009

Femboy x Femboy Day

On September 19th, 2022 is the National Femboy x Femboy Day, which it means that femboys needs to fuck eachother
Femboy 1: Fwiends! today its femboy x femboy day!! are you guys ready to fuck? >////w////< *gets naked*

Femboy 2: Yes!! u////w////u *Gets naked*

Femboy 3: Yes! OwO *C/ms*

Femboy 4: uhhuh O////////v/////////O

Femboy 5: YEAH!!!!!!! ✧///w///✧

Femboy 6: *they all starts to fuck in 19 hours*

Femboy 7: *they c/m togheter and continues to fuck*

Femboy 8: uwah! *m/sturbating*😍

Femboy 9: *m/sturbating as well*

Femboy 10: O//w//O!
More from Urban Dictionary

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
Word of the Day on October 1, 2026
korean word for madam, older woman
Ajumma wait a moment
Ajumma by aintnotinbutnice July 5, 2009
Word of the Day on September 30, 2026

Slop Grenade

When someone uses AI to generate a large document, slide deck, or piece of code/software and tosses it over the fence for you to deal with.
Chad: Hey Brent I sent you the new backend API change to review, it’s only 100 files changed.

Brent: he just tossed me a slop grenade
Slop Grenade by Joe Squid September 28, 2026
Word of the Day on September 29, 2026
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
After we broke up, he was floxi to me.
floxi by Dr. Geek May 13, 2009
Word of the Day on September 28, 2026
NYC people who migrate north to Quahog, RI to see the leaves in the fall.
New York and everyone from there can fornicate themselves with an iron stick.
leafers by ss++ February 8, 2005
Word of the Day on September 27, 2026

Respectfully 

Precedes or follows either a gratuitously disrespectful or honest remark, originated in New York City. Used in similar fashion to "no offense" or "to be honest," interchangeably.
Ya mans is wild buns, respectfully. Respectfully he's washed.

After school, The Modells on Jamaica Ave was active. Respectfully.
Respectfully by john quan the first December 20, 2020
Word of the Day on September 26, 2026
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