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infallible underpants 

A phrase mocking any token or procedure the possession or performance of which invests a person with arbitrary authority.

It's a nod to the specific criteria necessary for the Pope to be said to be exercising Papal Infallibility -- and so be speaking for God. Without fulfilling the criteria he's just a man in a funny hat and can be as wrong any anyone else.
"I don't need to look it up. I'm wearing my infallible underpants."

"For Christ's sake Bob, you've a clipboard not infallible underpants."
infallible underpants by jamiebabe August 14, 2015

Infallible Fell

Infallible Fell is a person who cannot fail no matter how difficult things become.
Riddick is the perfect example of the Infallible Fell.

aka infallible

A canadian douchebag who looks like my ex boyfriend whom I performed anal intercourse with. While anal sex is commonly associated with male homosexuality, research shows that not all gay males engage in anal sex and that it is not uncommon in heterosexual relationships.

In 1992, a study conducted by the U.S. Centers for Disease Control and Prevention (CDC) found that 26% of men 18 to 59 and 20% of women 18 to 59 had engaged in heterosexual anal sex; a similar 2005 SURVEY (also conducted by the U.S. Centers for Disease Control and Prevention) found a rising incidence of anal sex relations in the American heterosexual population.

He also has a flat white buttocks and engages in microphone activities on freechatnow.com
Last night I had an aka infallible, it was awful when we attempted it without lube.
aka infallible by Ashey_ November 22, 2014

papal infallibility 

The Catholic belief that the Pope is infallible; that is, he cannot err whenever he defines a doctrine of faith and morals, since he is guided by the Holy Ghost.
Papal infallibility is a paradox; at one point in time the non-infallible Pope declared himself infallible. But if he was not infallible when he declared himself to be so, then how can he make himself infallible all of a sudden?
papal infallibility by jsmith8800 February 16, 2008

Insallible 

The act of being insallible, or so completely infallible that that its satiating.
That Cii girl is pretty insallible.
Insallible by ciiel December 17, 2008

Infallicle

Incomprehensibly impossible. Something that is so hard to comprehend that it’s impossible to do.
Digging from one side of the world to the other, feet first, is infallicle.
Infallicle by Ankur420 November 13, 2022
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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