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Macbeth effect

The "Macbeth effect" study shows that people who have recently washed their hands tend to make harsher and more judgmental moral decisions. Conversely, those who feel physically "dirty" are more tolerant of minor ethical violations.
After washing his hands, he totally judged his friend for that minor mistake—classic Macbeth effect at play!
by Emotional Cruiser November 1, 2025
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The Costco Effect

That moment when you go to the store only needing a few things, then end up leaving with a whole cart of stuff, typically not including the original item(s) you came for. This term is not exclusive to Costco and can be used for any store that manages to get you to fall into its consumerist trap.
"Dang, look at all this stuff we bought. I only needed a couple of things !"

"That's the Costco Effect for ya"
by ChickenScrxtch82 April 20, 2024
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stinkfist effect

A condition when a person becomes so addicted to something that he/she needs more and more to satisfy his/her demands to the point of absolute extreme, based on lyrics of song Stinkfist by Tool.
Watching too much porn can lead to developing stinkfist effect, that can totally mess up your life.
by Mower420 September 7, 2019
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Mandela Effect

saying that something is there when it really wasn't
James: Dude, didn't you know that Curious George has a tail?
Joe: you just experienced the mandela effect
James: what
by SebDoesDefinitions_ March 14, 2022
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Kylie Effect

When a male is so aroused by a woman it feels as though the penis is strecthing out of its skin.

When a male becomes so aroused by a woman that minor or no contact will cause ejaculation.
I was watching videos of Kylie Jenner modeling in a bikini and I felt the Kylie Effect and almost exploded out of my skin.
by Frandriguez May 5, 2025
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Missouri Effect

When you get here most women you would say are a 6-7, but after a few weeks, you are suddenly unbelievably horny after locking eyes with any woman at a Casey’s
I believe the Missouri effect has kicked in man, that crackwhore was bad as hell, I can definitely fix her
by Urbanmo August 14, 2023
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The Syndo-Mathian Effect

When you trick someone into believing something that isn’t true, typically under the guise of having scientific or research-based proof. Often for humorous intent
Daniel: You know how you’ll learn about a song, and then you start hearing it everywhere?

Bill: Ah yes, I believe that’s called Wesolowski’s principle

*later*

Daniel: Hey man, I looked up that thing you said, andI can’t find it anywhere!

Bill: *chuckle* My friend, you’ve fallen victim to the Syndo-Mathian effect
by Dr K Chaudhry April 30, 2024
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