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.

1. A condition marked by the use of facebook to the point that it startes interfering with day-to-day functioning. Alongside this may occur a "break with reality" regarding what is real and what isn't on facebook.

2. Lacking judgment regarding how shitty your content is before posting it, but posting it anyway.

3. Using facebook to the point of experiencing delusions of people giving a shit about your life. Up to and including having hallucinations of people giving a shit about your posts and opinions.

When a person who frequently uses a Bluetooth device begins to continuously hallucinate that they are on the phone.

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.

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.

Mental illness that occurs in workers restricted to cubicles for 8 hours a day

A term referring to the highest level of craziness recently shown by the 45th POTUS.