Affects populations from the northern hemisphere such as Canadians during winter, unusual behaviour that fucks up their outlook and thinking. Even the most normal people become psychos and unpredictable. One wonders why they are behaving like flakes all the way around.
Eg: Most average Canadians go into winter psychosis after Christmas time until the month of May.
Eg: If you are experiencing strange behavioural changes with relatives, co-workers or at school, chances are these people are being affected adversely by this condition.
by hatewinter March 7, 2014
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An altered state experienced by participants and/or fans of a sporting event which render them incapable or rational thought. It can occur before, during, and after the event. Face painting and conspiracy theories are all examples of people experiencing competition psychosis.
Dude 1: Can't believe how those refs were cheating my boys.

Dude 2: They lost by 40.

Dude 1: The refs hated us.

Dude 2: You got a bad case of competition psychosis if you believe the refs were the reason for that ass kicking.
by DDJudge June 14, 2012
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When a person who frequently uses a Bluetooth device begins to continuously hallucinate that they are on the phone.
My partner wound up being treated for his Bluetooth psychosis which had its origins in his inflated sense of self-importance.
by Dr Bunnygirl January 13, 2019
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When the mentality of one member of a group cause the rest of the group to follow suit. The behaviour shown is usually anti-social, brutal and mob-like.

A perfect example is in the film Stoic, staring Edward Furlong. 3 guys in a prison cell fall into the same mindset, playing off each other, and torment, rape and torture their 4th cell mate, leading to his suicide.
Guy 1 "I think we should bum Guy 3 ragged."
Guy 2 "I dunno man, that's not right"
*Guy 1 starts bumming Guy 3*
*Guy 2 joins in and skull fucks Guy 3*
Guy 3 "So this is group psychosis?! How fun! Let's swap ends!!*
by Jam_1_ January 7, 2014
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Hydrogen psychosis is a fictional ailment acquired by SCUBA divers in the Wes Anderson-directed movie The Life Aquatic with Steve Zissou. It is apparently based on the very real health risk nitrogen narcosis, caused by the effects of relatively fast, relatively great changes in external pressure on the human body.
Man, you got hydrogen psychosis!
by Furieh April 8, 2006
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Mental illness that occurs in workers restricted to cubicles for 8 hours a day
Mary is on medical leave. She was a hard worker but broke down and had a bad case of cubicle psychosis.
by drjudyg November 4, 2010
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Noun -- Pejorative term to describe Christianity or Christian morals. Also, 'X-Psychosis.' (See also the more general 'R-Psychosis.')
The majority of Americans are infected with a form of Christ Psychosis, a mental illness that influences domestic laws, foreign policy, and popular culture.
by Phil Studge January 19, 2007
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