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olfactory "hallucinations" 

When you smell something that really isn't there.
I've had many olfactory "hallucinations" like when I smell mustard & there's none around!

hallucious 

sickening; atrocious, especially anything artistic that's shlock.

From the Yiddish "a chaloshes", literally to faint
I replaced the hallucious plaid wallpaper.

That chutney tastes hallucious.
hallucious by Slumdog January 18, 2009

mass hallucination 

The only explanation for the Right’s perverse devotion to the Mobster in Chief.
In this ongoing mass hallucination, he is seen as someone who can make America great again; how crazy is that?

Guitar Hero Hallucination 

1)The Feeling of the world "Zooming In" after playing any of the Guitar Hero Series Games for an extended amount of time.

2) Proof that Guitar Hero isw a Legal Drug
Guitar Hero Hallucination is an awesome feeling!

memoric hallucination 

A memory of something that never existed in the first place, also known as a "false memory", but fancier.
J: "Remember that one time I ate lead paint and then crawled on the ceiling?Hahah, that was funny, right?"

G: "N- ... No, that ... That never happened. You feeling alright?"

J: "Oh. I guess I had another memoric hallucination. It's fine. I'm fine. It's fine."

Hallucibration

The sensation you get when you know your phone is on silent and you feel it vibrate in your pocket only to discover when you pull it out that you had imagined it.

Hallucibration(s), Hallucibrating, Hallucibrates.
person a - Hang on, my phone is going off - oh, no, wait - I was just an Hallucibration
Hallucibration by Jammin420 August 19, 2010
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

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
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