An example of somebody displaying cognitively dissonant behaviour would be a situation where the persons views, values, beliefs etc are contradicted or opposed by one or other persons causing them mental (psychological) stress. At this point a state of cognition is triggered effectively causing them to refute, reject &/or miss-perceive the contradictory views, values or beliefs.
"smoking will most likely cause you to have cancer you know?"

"hmmm I'm not so sure I know people who have smoked all their lives and they're fine, plus I enjoy it anyway.." this is cognitive dissonance
by Oberon February 5, 2019
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(verb). Often occurs when a person has spent an excessive amount of time in an intellectual situation (ie-- cramming for an exam, marathon seminar sessions, problem-solving) and is not longer able to process info due to mental fatigue. Even simple thinking (ie-- how do you toast bread, what is your boyfriend's sister's name?) is impaired because mentally wiped out.

You may not be physically tired, but mentally feels like you are now an e-tard.
Sally spent 12 hours straight studying for some class, and therefore is unable to describe the most basic things, like how to make a sandwich. She is now cognitively fucked.

I can't even think of a good enough example because I've been working on this stupid problem for 13 hours and now I'm cognitively fucked and want a beer.
by sleepywantbeer September 10, 2009
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A condition of conflict or anxiety resulting from inconsistency between one's beliefs and one's actions, such as opposing the slaughter of animals and eating meat.
This child is going through a state of cognitive dissonance as he imitates his hero while physically beating his friends.
by Nee - Oh - Corn June 5, 2003
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Noun:

Any of a number of conditions characterized by the involuntary suspension of mental processes crucial to self-expression and/or higher reasoning.

Cases of cognitive impaction can frequently be identified by inarticulate attempts at discourse, extended guttural utterances, slack-jaws and bugged out eyes on the part of the afflicted. Treatments are highly specific to each variety of cognitive impaction and range from a slap "upside" the head to a deadline in the most severe cases.

Also see mental constipation.
"Overwhelmed at the prospect of having the bounty of an entire doughnut shop all to himself, Homer immediately suffered a massive cognitive impaction that reduced him to little more than a drooling mass of manflesh."
by Joshua B. Wright April 5, 2004
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a time in one's life typically mid twenties or more specifically 24 going on 25 when one does not know who the hell they are or where the hell they are going. This may be exhibited through mood swings, fatigue, backaches, headaches, frequent urination, food cravings, and nausea.
I think I'm going through cognitive puberty, last night after a 10 hour work day, I volunteered at the humane society, mentored a kid, watched the news, went to happy hour, played beer pong, auditioned to be a dancer - got rejected and woke up in my parent's basement.
by Maria Garcia Perez Rodriquez January 25, 2011
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The conscious decision to choose the less favorable of two choices resulting in greater probability of a bad outcome.
Refusing to vaccinate to protect yourself is cognitive Darwinism at its finest.
by Pablo Tornado September 27, 2021
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A more extreme form of verbal diarrhea, it is a pretentious and long-winded explanation of one's thoughts or understanding of a painfully boring topic; it is often mistaken for intellect but is really just stupid shit that people say in a failed attempt to seem smart.
cognitive discharger: "The Arc de Triomphe is my absolute dream representation of Napoleonic neoclassical architecture because of the grandness of its triumphal arch and the simplicity of its romantic neoclassic relief. Absolutely astounding!"
listener: "Oh, fuck off."
by heihej March 25, 2010
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