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S-Day is a day of messing with anyone with the letter S in their name. It is full of jokes, rage, and happiness! It happens on the 18th of December.
Sally: Hey, Jacob.
Jacob: Its S-Day.
Sally: OH GOD NOT AGAIN
S-Day by JoshIsNotMyName December 18, 2020

Phallentine's Day 

February 12th. A phallic celebration. A superior holiday to precede Galentine's Day on February 13th and Valentine's Day on February 14th. It is a day to spend time with your fellow bros and dudes while doing manly things.
Hey Chris, I heard the ladies are getting mani-pedis for Galentine's Day. Let's go eat some meat, drink some whisky, and start a fire on Phallentine's Day.
Phallentine's Day by gngomez January 25, 2017

Ramentine's Day 

A holiday that occurs annually on February 13, where people celebrate their loved ones and their love for ramen. It is customary to eat ramen on Ramentine's Day. Created by American-Canadian couple Jacob and Lori.
Ramentine's Day by Jacobandlori February 13, 2019

Bad Boob(s) Day 

(akin to Bad Hair Day); When a gal's normally perky breasts don't seem so fresh or vital on a given day.
Poor Carol - at the pub after work on Friday, her always luscious boobs were, as usual, the center of attention and much commented upon (privately), even through her blouse and pantsuit. And now here it is the following Monday afternoon: she's had to skip lunch because of an emergency meeting, she's missed an important deadline, a fight or two with a client and alas, her normally shapely knockers seem so much the less today - slightly frumpy, a tad saggy and OMG ! have they SHRUNK ? She's evidently in the midst of a bad boob(s) day.
Bad Boob(s) Day by HAL 666 October 12, 2008

International Men's Day 

The annual event in which Twitter endures a thermonuclear implosion.
Guy 1: "Hey did you know that today is International Men's Day?"
Guy 2: "Oh god, the FBI is gonna have a field day with the amount of doxing that's gonna happen."

Darf’s Day 

The day that was created on an app to really showcase just how naive some people can be.
Viva and Sonic watched as Darf typed Darf’s Day
Darf’s Day by Sonic2726 October 27, 2018
More from Urban Dictionary
anyone who succeeds in disgracing/over indulging themselves in the throws of clubland
28 hours and 4 clubs later, gurning for england but still refusing to go home - a total wrongun!!
wrongun by bevvers March 21, 2007
Word of the Day on October 8, 2026

square grouper

Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026
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