Skip to main content
Urban Dictionary Merch
Your favorite words on things you can wear, drink from, read, or give to a friend.
The Urban Dictionary Store sells gifts you’ll have to explain.

septillion 

10 followed by 24 zeroes in America, and 42 in Great Britain. Okay, you're basically swapping the zeroes around.
Guy 1: Holy shit! I got a septillion dollars! I'm a septillionaire!
Guy 2: Whoa dude! That's almost like infinity! Build me a Megameter skyscraper!
septillion by Yottatron April 24, 2016

sectillian 

A bloke that is employed at Sectight Security and Electrical based in Carrum Downs, a suburb of Melbourne. Usually found to be a raging alcoholic or hooked on hard drugs with an unhealthy reliance on meth/heroin.
Did you see that Kev cunt last night? The cunt was fucking fried. Yeah he must be a Sectillian.
sectillian by Clungemuncher82 December 11, 2017

Septillion Quaffle

A planet far off in a separate universe inhabited by fleshy puddle like creatures known as Garfunkel Tiddles. They are very jolly and put on a good show doing little dances. But there’s are also Garfunkel Nipples which are very aggressive and murder numerous Garfunkel Tiddles.
“Stop playing before I kick your ass so hard you go all the way to Septillion Quaffle!”

SeptillionSeven 

Cutest dragon in all the lands. You should give them all your money :3
Did you know that SeptillionSeven is absurdly queer??
You do now.

septillionsome 

When you have sex with a septillion beings that would probably include humans, aliens and interdimensional beings.
Bob told me he was in a septillionsome yesterday, but I didn't believe him.
septillionsome by Boar1 August 18, 2024

septillional

Pronunciation: /sɛpˈtɪl.jə.nəl/
Definition:
1. The ordinal number symbol: 1,000,000,000,000,000,000,000,000.
2. A position in a numerical sequence so vast it exists at the frontier between mathematics and abstract philosophy.
3. Pertaining to a scale used almost exclusively in theoretical discussions of maximal entropy.
4. Denoting a unit of divisibility so extreme it serves as a metaphor for practical impossibility or the limits of physical representation.

Significance:
• It defines the septillionth position with systematic regularity and clarity.
• It emphasizes the conceptual limits of quantification, megascale entropy, and the mathematics of ultimate physical limits.
• It identifies scales relevant to Bekenstein bound calculations, the total number of Planck units in cosmological horizons, and the upper bounds of statistical mechanics in closed systems.
• It avoids irregular and ambiguous pronunciations.
• It simplifies the lexical expression of quantities that operate at the extreme boundary of physical reality and mathematical modeling.
• It improves precision in meta-scientific discourse concerning the quantification of "everything" within a given theoretical framework.
• It replaces Scandinavian-Germanic, Non-American, foreign, and Anglo-Saxon terms, similar to replacing "septillionth".
Adjective: septillional
Ordinal number: septillional (1,000,000,000,000,000,000,000,000th)
Cardinal number: septillion (1,000,000,000,000,000,000,000,000)
Examples:
• "The total entropy of a cosmological horizon is estimated to be on the order of a septillional units."
• "A septillional part of that energy is less than a single quantum fluctuation."
• "Some models posit a septillional possible vacuum states in the string theory landscape."
• "The probability is less than one septillional, effectively defining the term 'impossible' for any physical process."
• "The number of discrete Planck volumes in the observable universe is violently one septillion. Thus, a septillional represents a single, indivisible unit at that absolute scale."
septillional by Dmitrio January 14, 2026
More from Urban Dictionary

square grouper

Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
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
Load more