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To be tricked into doing something stupid i.e. Foolish by someone and/or something.

Often done among friends as friendly jesting and is rarely malicious.

People who are fooled regularly could be described as a Fool and/or n00b.
Friend 1: Argh!! This bastard vending machine took my money!

friend 2: Lol! You got fooled!
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Friend 1 on msn: Here mate look at this new half life 3 preview screenshot it looks well good

Friend 2 on msn: What?! They're making it already?! Send it to us

*sends Tub girl photo*

Friend 2 on msn: Thanx mate

*Prolonged waiting as Friend 2 vomits excessively*

Friend 2 on msn: Damn you are sick!!

Friend 1 on msn: Lol! You got fooled
Fooled by Dan January 13, 2005
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Fooled-Yous 

A pair of overly large sunglasses that cover and disguise a large portion of the face of an ugly person with bad bone structure. Once removed the true ugliness is revealed.
Tina looks like a troll without her fooled-yous on.

You have terrible bone structure that fooled yous will hide, making you more attractive.
Fooled-Yous by SydCanSam April 2, 2009

Fooled by an Asian 

When you're checking out a girl from behind only to have her turn around and have an ugly Asian face.
Damn, I just got Fooled by an Asian.
Fooled by an Asian by K-Noodle December 28, 2007

Fooled at First Sight 

When you think a girl is really hot initially, but then you see other pictures of her that aren't as flattering. Your opinion of this girl deteriorates and you sometimes even question her beauty.

Also can be referred to as Fooled at First Boner.
"I used to think this girl was very hot, but after seeing unflattering Instagram pictures of her, I no longer think much of her in the looks department."

"Seems like you were fooled at first sight."

fooled out 

When something/someone is bugieghetto, extremely gay, bootleg, or straight up stupid.
Yo, that nigga is a fooled out playa hata.
fooled out by gangsta sk8er noah February 8, 2005

Fooled by Randomness Theory

The theory, from Taleb's book of the same name, that humans systematically misinterpret random events, seeing patterns where none exist and attributing skill to luck. Fooled by Randomness Theory argues that we are narrative creatures, wired to find stories in noise, to see causes where there are only correlations, to believe we understand what is actually random. Successful traders are often just lucky, not skilled; failed entrepreneurs are often just unlucky, not incompetent. The theory explains why we overestimate our ability to predict, why we trust experts who are actually random, why we build theories on statistical flukes. It's the foundation of skepticism about success stories, about "genius" CEOs, about anyone whose track record could be explained by chance. The theory doesn't deny skill; it insists on distinguishing skill from luck—and shows how bad we are at that distinction.
Example: "The hedge fund manager had ten years of brilliant returns. Fooled by Randomness Theory asked: could this happen by chance? The math said yes—a few funds will always be lucky by pure randomness. The manager was celebrated as a genius until the next ten years revealed the truth: he'd been lucky, not skilled. His investors had been fooled by randomness."

Fooled by Circumstances Theory

A framework revealing how we mistake transient circumstances for permanent structures, or local conditions for universal laws. Fooled by Circumstances Theory shows how we attribute outcomes to inherent qualities (skill, character, destiny) when they are actually products of specific situations. The successful are not necessarily better; they may just be in favorable circumstances. The failed are not necessarily worse; they may be victims of circumstance. We are fooled when we ignore the power of context, seeing only individuals and their choices.
Fooled by Circumstances Theory "He succeeded, so he must be brilliant. She failed, so she must be lazy. Fooled by Circumstances: ignoring that he had family wealth and she had none, that he had connections and she had none. We see people; we miss the circumstances that make them. Circumstances fool us, and we never even notice."
More from Urban Dictionary
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

Slop Grenade

When someone uses AI to generate a large document, slide deck, or piece of code/software and tosses it over the fence for you to deal with.
Chad: Hey Brent I sent you the new backend API change to review, it’s only 100 files changed.

Brent: he just tossed me a slop grenade
Slop Grenade by Joe Squid September 28, 2026
Word of the Day on September 29, 2026
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
After we broke up, he was floxi to me.
floxi by Dr. Geek May 13, 2009
Word of the Day on September 28, 2026
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