Staying up all night from Sunday to Monday morning. Two days rolled into one
Stayed up all Sunday , still awake Monday morning. Feels like a Smunday

Lets get on the Sunday sesh , love a good Smunday

Only planned going out for abit Sunday evening. Now it's Monday . Had no sleep. Got work in couple hours, been a messy one. Definitely a Smunday
by PeckishPeg July 22, 2018
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Noun; The comination of the days Sunday and Monday. Often used to describe a 48 hour period of sleeplesness between Saturday and Tuesday.
"Dude, I havent sleep since yesterday, it's been one hell of a Smunday."
by KungFuCorey December 10, 2006
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When you take Monday off work because you just need an extra day off. It's not Sunday and doesn't feel like Monday, it's Smunday. Similar to how Brunch is a hybrid between Breakfast and Lunch.
I was so tired after the weekend I called into work sick this morning; I'm taking a Smunday.
by kickback chick January 20, 2012
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hours between Sunday A.m till you go to work after the weedend
I have to go in to work early Smunday morning
by CKing2051 June 19, 2019
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figuratively spoken, the day between sunday and monday;

actually its a monday where you decide to not DO or GIVE a fuck, just like on sundays

the perfect smunday is a day, where you don't even know if it's sunday or monday
A: Are u going to school/college/work tomorrow?
B: Nah, it's smunday.

A: What day is it? Monday or Sunday? I didnt left the house today.
B: No fkin idea. Me neither.
by norbart, the pirate March 8, 2012
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Smunday; Smut day
It’s a 48 hour period where all smut goes and is released
Chad: normal porn isn’t cutting it these days
Brad:we’ll your lucky cause it’s Smunday?
by ÇrïšANDÇhłø126 September 12, 2022
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The day between monday and tuesday
Friend 1: What did you do smunday

Friend 2: smelt a mouse
by Jaythenutgod July 28, 2018
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