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SatErday 

Noah: Yo kyLe what day is it.
kyLe: it’s SatErday bro.
SatErday by Mopw June 7, 2018

Sunderday 

The time between Saturday night and Sunday morning where all awesomeness seems to happen. It's after all the friday night and saturday day activities happen. It's after downtown happens and before you decide Sunday morning you want to curl up in a hole and sleep for the rest of the week. It's where all of your favorite pictures are taken and you have to ask your friends who the heck is that?
Last Sunderday was probably the best time of my life! I can't even remember how or why we did all that... but it sure was epic!
Sunderday by msmermermac August 16, 2010

superday 

The most important day of your college career- the final round interview with a firm. Don't mess up.
Lloyd: Dude, did you hear? I made it to the Goldman superday!

James: That's awesome! I have one for Morgan Stanley!

Lloyd: Don't fuck up or the 200k you spent on tuition will go down the drain.
superday by ibd January 22, 2013

Summerday 

The state of being unaware of the day as a result of it being summer.
MOM- "get up do u know what day it is today?!?"
ME- "uhhh its summerday."
Summerday by nynick1 September 5, 2009
Scat-Saturday. The day that comes directly before Sunday bunday.

Scaterday is the day you actively participate in scat related events and / or activities. This could be as simple as watching scat related porn all the way to participating in scat related porn.
"I think I'm going to take it easy on Laura this Sunday bunday, because I'm going to destroy her on Scaterday."

Laura: I don't think I want to go out for mexican tonight. Matt gave me a cleveland steamer on Scaterday and I'm still a little shaken up by it.

Stacey: Been there, done that....how about chinese?
Scaterday by A$$M@ST3R March 31, 2010

Cunterday 

The day of the week when you’re scheduled to work with your cunt boss. Definition may be extended to coworkers, family members or douchebags in general.
“Yeah, I’m scheduled to work with _____ today, it’s Cunterday.”
Cunterday by What_tha? July 13, 2023
More from Urban Dictionary

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

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
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