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Case of the Mondays

A phrase used to describe someone that has a bad mood when he or she comes to work or school on Mondays.

OR

A phrase that someone uses if he or she wants to get their ass kicked by their fellow co-workers or school mates.
Jerk #1 - When you come to work on a Monday, has anyone ever told you, "Looks like someone's got the case of the Mondays."?

Jerk #2 - No... No man... Shit, no man... I believe you get your ass kicked for saying something like that.
Case of the Mondays by Elmer November 25, 2005
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Case of the Mondays

1. A fictitious disorder associated with the tiredness, irritability or distractedness that comes from returning to work after the weekend.

2. A phrase discribing idiots who use the beginning of the week as an excuse to be irritable and lazy when, in fact, everyone feels this way but would rather do their damn job instead of being annoying bitches.
Coworker #1: Man Terry sure is in a bad mood today.
Coworker #2: Yup, looks like he’s got a case of the mondays.
Coworker #1: Man! What a little bitch.

Sounds like someone has a case of the Mondays 

Something said by obnoxiously cheerfull bastards when someone is feeling tired and/or cranky. Mondays tend to be a horrible day since it's the first day of the working week. Made famous by the movie Office Space.
Peter Gibbons: Let me ask you something. When you come in on Monday, and you're not feelin' real well, does anyone ever say to you, "Sounds like someone has a case of the Mondays"?
Lawrence: No. No, man. Shit, no, man. I believe you'd get your ass kicked sayin' something like that, man.

A case of the Mondays 

A commonly felt situation in which oneself is drug out of his natural habitat and pushed into an environment where he must work to feed himself and/or his family. Typically accompanied with feelings of dread, hopelessness, and existential meltdowns.
VA Tech Student: Run, the asian kid has a case of the mondays!

case of the monday's

symptoms of a useless or horrible Monday morning after returning from the weekend, used in the movie Office Space
Sounds like a case of the monday's
case of the monday's by alpine January 25, 2004

Case of the monday's

when someone comes into work on a monday and they're really pissed off.
"say lawrence when you go into work on a monday and your not feeling too good does anyone ever say to you sounds like a case of the monday's?""no, no man, shit no, i reckon you'd get your ass kicked saying something like that.
Case of the monday's by Mick July 9, 2004
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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.
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I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
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"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
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Ajumma wait a moment
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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
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