Saunday 

Saunday - the incredible feeling of relaxation and relief, as if in a sauna, felt Sunday night after finding out that any school/work related activity has been canceled for the next day. Symptoms may include elation, as well as inconsideration for any responsibilities.

(Saunday for teens)
After having an awesome Sunday, John did not want to go to class the next day and was depressed the weekend was over. However, that night all students were notified that all classes were canceled the following day. John was relieved and got wasted all night.

(Saunday for adults)
After working overtime all week Conti was releieved to finally make it to the weekend. Knowing that the next week would be the same he miserably went to bed, not even having time to sleep with his wife for he had to wake up very early. However before falling asleep his boss called and told him the office would be closed tomorrow. Elated, Conti banged his wife and got dootzed the whole night.

Saunday by Tartly April 3, 2009

Spite Monkey Sunday 

Spite Monkey Sunday is that day of the week when all the brain dead little losers try to get definitions accepted by Urban Dictionary. They try to get a flattering definition accepted, of themselves if they haven't got any friends, or of some female if they think it will help them get into her knickers. Why? Usually because they’re back at school on Monday and are trying to make themselves look good, the poor little winkies. Then the unthinkable happens, they’re definition is rejected because it doesn’t conform to the rules laid down by Urban Dictionary. Oh Calamity! So the silly little wank biscuits throw a hissy fit, go into a session to vote on the inclusion of new words and reject everything without bothering to read it. Then comes Monday and these sad little gleets go back to school and bother the human race somewhat less than they do at weekends.

“Couldn’t get a thing accepted on Urban Dictionary, it was Spite Monkey Sunday.”

Spite Monkey Sunday by AKACroatalin April 27, 2015

Sod All Sunday 

Definition---
An entire Sunday day which passes where absolutely nothing transpires; A miscreant day which you will never remember; A Sunday which is sullied away to pyjama wearing and not bothering to lift ones arse away from the sofa for more than a toilet visit. The phone does not ring and your mobile is not blessed with anything other than a full battery.

Example---
Dan: How was your Sunday? Get up to much?
Garath: Good mate cheers, I had a sod all Sunday.

Sod All Sunday by Gwendolenalexia July 31, 2012

Stunday

A Sunday which involves significant amount of studying

Paul: “Are you coming out to walk the dogs in the park?”

Claudio: "Ah, sorry. My favorite study streamer is online. I am going to spend rest of the Stunday at home."

Stunday by nish-ant May 2, 2021

sunday curse 

having school or work on monday, and not being able to get to sleep on sunday.

usually it carries over, and makes it really easy to get to sleep on monday night, although sometimes a little too early

I got 3 fuckin hours of sleep last night because of the damn sunday curse

sunday curse by diddy kong September 22, 2007

Sunday Scaries 

The feeling you have after a long week of work followed by a Saturday full of binge drinking, when Sunday hits you question your entire existence. Typically characterized by laying in bed all day and both regretting past decisions and questioning your seemingly non-existent future. Thoughts like "I"m going to die alone" and "Will I ever get a job that I actually enjoy?" consume you for the entire day while you're battling a hangover.

Wow I haven't seen Chad all day! He must have a bad case of the Sunday Scaries

Sunday Scaries by swaggerkitten101 February 12, 2017

Sloppy Sunday 

When two people have wild sex on Saturday night and wake up on Sunday morning to dried cum and smelly sweat.

Jake : Wow honey guess another Sloppy Sunday huh!
Kiersten : Yeah we should really shower!
Steve : Hey guys I got dibs on the shower gosh it really smells in here!
Jake : Uh what the fuck is he doing in your apartment?
Kiersten : Don't worry I'm calling the cops!

Sloppy Sunday by SlopNChop August 6, 2017