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Uncertainty 

the state of being uncertain.
something that is uncertain or that causes one to feel uncertain.
"have we discussed doing counseling before the wedding?"
"Ian’s trying to say I shouldn’t pay my fiancés bills. Do you agree with that?"
-Uncertainty
Uncertainty by somedaysomehow October 27, 2023

uncertainty principle 

1. States the position and momentum of a particle cannot be simultaneously measured with arbitrarily high precision. This is a crucial concept that is a part of quantum mechanics

2. The modern-day version states to never judge a girl's looks from a distance greater than or equal to 50 feet.
The uncertainty principle seems very straightforward.

Man, I was drunk last night at the party and the uncertainty principle totally slipped my mind. I swore he looked like a girl.
uncertainty principle by PVD October 5, 2004

Uncertainty Principle of Science and Epistemology

An adaptation of Heisenberg's insight that observation affects the observed, extended to science and knowledge itself: the act of studying a phenomenon inevitably changes it, and there are fundamental limits to what can be known simultaneously. The Uncertainty Principle of Science and Epistemology suggests that in studying complex systems (societies, minds, ecosystems), the very act of measurement alters the system. Moreover, there are trade-offs: the more precisely you know one aspect, the less precisely you can know another. You cannot simultaneously know the position and momentum of a particle; you cannot simultaneously know the structure and dynamics of a society; you cannot simultaneously know the content and context of a belief. Knowledge has fundamental limits—not due to poor instruments, but due to the nature of reality and the knower's inescapable role in it.
Uncertainty Principle of Science and Epistemology "Study a society, and it changes because it's being studied. Measure a mind, and it's altered by the measurement. Uncertainty Principle for Science says: there are limits to knowing, not because we're bad at it, but because knowing changes things. The more precisely you track a variable, the more others blur. Science isn't broken; it's just uncertain—and uncertainty isn't failure, it's physics."

The Big Time Rush Uncertainty Principle 

That feeling of dread one gets when they are fearful of leaving their house because Big Time Rush will be having a live concert in their front yard.
Guy: Do you want to go out later?
Girl: No, I can't leave my house because of the Big Time Rush Uncertainty Principle.

eye contact uncertainty 

what happens when you are not sure if someone is making, or is trying to make eye contact with you. generally occurs in crowded places over a distance.
is that hot guy way over there smiling at me? i am plagued with eye contact uncertainty.. D:

Hiding Bug Uncertainty Principle

This law of nature states that if you see a gross bug in your room and it crawls out of sight, it could be anywhere in the room. It follows that there is a significant possibility it could be about to crawl onto you, and this fact will eventually freak you out.

Borrowed from the Heisenberg Uncertainty Principle, which states that both the position and momentum of an electron cannot be known.
I just saw a spider go behind the desk, and by the Hiding Bug Uncertainty Principle it could come out of nowhere and crawl on me at any moment.
More from Urban Dictionary
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
Word of the Day on October 1, 2026
korean word for madam, older woman
Ajumma wait a moment
Ajumma by aintnotinbutnice July 5, 2009
Word of the Day on September 30, 2026
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