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The most depressing day of the year. Also a popular song by New Order.
Jim: My cat died and I have too much damn homework.
Mark: Blue Monday bro.
by eazzton September 5, 2018
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1. Blue Monday is the most depressing day of the year, calculated by Dr. Cliff Arnall, a researcher at the University of Cardiff's Center for Lifelong Learning.
Factors used to calculate the date included weather conditions, debt level, time since Christmas, time since failing our New Year's resolutions, low motivation and feeling the need to take action.

In 2005 the date was calculated as January 24th, in 2006 it was January 23rd, and in 2007 it was January 22nd.

2. A song by the hard rock band Orgy from their album Candy Ass.
1. Guy: "Aw man, I feel like absolute shit today."
Friend: "Yeah, same here. I hate Blue Monday."

2. "I wish I could sing Blue Monday to my ex-girlfriend, she's such a bitch."
by L_Roku August 31, 2007
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Cool 1983 song from New Order. Gained giant popularity in the late 90's when the band Orgy covered it for their album Candyass.
Blue Monday is an amazing song.
by Gaaraofthedamned December 21, 2011
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Having blue balls on a monday before noon.
10:45a.m. Monday, I have the most uncomfortable feeling of pain in my balls. Its gonna be a Blue Monday.
by JerseyRocker17 August 15, 2011
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A phrase describing the come down of MDMA. The comedown of the drug has a feeling of deep depression and suicidal feelings. It originated because people would use MDMA on the weekends and then feel shitty on (blue) Monday
1: Did you do MDMA last weekend
2: Yeah but i’m feeling the consequences today
1: Blue Monday?
2: Exactly
by TikTokfan223344 August 21, 2019
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An alternative to the term Cyber Monday, Blue Monday is the Monday after Black Friday, when online retailers will be looking for their biggest sales from those who checked out products over the thanksgiving weekend, and will now be ordering them Monday at work.

Forget those long Black Friday lines, I'm going to order on Blue Monday!
by the_neb November 27, 2007
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When you go to work or to school really tired and upset because you stayed up really late to watch your favorite football team play and they lost. All comes equipped with a hangover and bad stomache.
John really had the monday blues after the Redskins beat his favorite team the Dallas Cowboys 35-7.
by Danibee December 20, 2005
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