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Fansacking 

The act of using a fan to gently air the male genitals.
I went for a long run but I got so hot I had to come home, lay in bad, and fansack.

I caught my boyfriend fansacking last night.
Fansacking by Tanny and Lazlo November 19, 2010

flatpacking 

The Process of Putting Flat pack furniture (think IKEA) back into its original Box

The process of Un-Flatpacking is removing flat pack furniture from the box and forming it into the product.
Hey Man, I'm moving house, want to help me with some flatpacking? I have an Ikea desk and the original Box
flatpacking by IkeaSwede September 2, 2012

Flapjacking 

A male with an erection, lies on his back while a second erect male inserts the penis of the first into his anus then lies back. A third male inserts the penis of the second into his anus and lies back forming a stack. A three man stack is known as a short stack, A stack of four or more is known as a full stack. Full stacking has the added benefit of asphyxiating the bottom participants. The flapjacking experience can be enhanced by using maple syrup as lube and having each participant massage the balls of the person above.
Mark, Mike, Jason and Joel were planning a full stack flapjacking session last night but Joel didn't show, so the three had to make do with a short stack.
Flapjacking by crankbait July 27, 2012

Flatbacking 

A bitch or bird with no job who sleeps around for money and material things.
Yo! How did Shawty get that Gucci Bag, she don't work even no where?

Ans: Shawty be flatbacking.
Flatbacking by V Double November 10, 2010

Flapjacking 

That girls ass was so round and fat that I was flapjacking that shit all night long!!
Flapjacking by jjstl April 27, 2010

flapjacking 

to roll down the windows of your car and let your boobs hang out and flap in the wind.
emma was flapjacking last night.
flapjacking by ashannah March 3, 2010
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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