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From an automatic win when rolling dice in ceelo, used as an adjective to describe any best-case scenario.
"I found a winning lottery ticket in my new office after my promotion when I was banging the infertile supermodel secretary they imported for me. Today was 4-5-6."
4-5-6 by InstantRamen February 9, 2010
a new short phrase to replace " for fuck sakes.. " when said quick enuf 4-5-6 sounds similar..


made up by way cool older sister when we were kids and is stil in use today ... was an attempt to be smarter then my parents at swearing..
OH!!! 4-5-6 ( OH! for fucks sake!"
4-5-6 by Lori October 22, 2004
A 4-5-6 is when a customer enters your department with product from another department expecting you to ring them up.
Yo, dis beeatch wanna me ta ring her dvd's and shiiit... and I told her to 4-5-6.
4-5-6 by Rob R. December 8, 2006

1,2,3,4,5,6,7,8 and 9 

all the 1 digit numbers
1,2,3,4,5,6,7,8 and 9 are all 1 digit nums

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 

This is how to count to 20. Pretty sure you already know this.
I am going to count to 20. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20.

1 2 3 4 5 6 7 8 9 10 

Why are you looking at this definition? You know how to count to ten.
Guy 1: 1 2 3 4 5 6 7 8 9 10
Guy 2: Smart.
1 2 3 4 5 6 7 8 9 10 by Matt11111 January 2, 2012
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
NYC people who migrate north to Quahog, RI to see the leaves in the fall.
New York and everyone from there can fornicate themselves with an iron stick.
leafers by ss++ February 8, 2005
Word of the Day on September 27, 2026
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