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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.
by Elmer November 24, 2005
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2
symptoms of a useless or horrible Monday morning after returning from the weekend, used in the movie Office Space
by alpine January 25, 2004
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3
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.
by Mick July 09, 2004
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4
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.
by Not__Mediocre_Definitions June 21, 2018
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