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Sideballing 

To look out the corner of your eyes at someone so that they "can't tell your looking"
I changed my radiator in the parking lot of the apartment complex. Noone said anything, but alot of people were sideballing.
Sideballing by Tug33 June 12, 2011

Sidehilling 

1. Sidehill
When your girl is on all fours and your doing her doggystyle, knock one arm and one leg from under her and ride her sideways off the bed trying to stay on the bed as your riding her down.
"hey Heather, snowmobiling ain't your thing, we can try sidehilling.....tonnes of fun"
Sidehilling by K.Reeb February 1, 2005

sidetalking 

1. Using a Nokia N-Gage as a cell phone, thus appearing to hold a sideways taco to one's face.

2. Mimicing the use of a Nokia N-Gage as a cell phone.

3. Holding anything up to your face sideways and talking into it.
I was sidetalking when I held that Super NES up to my face sideways and took a picture of myself talking into it.
sidetalking by The Sound Guy November 3, 2003

Sidewalling

A trail of shit left down the bowl of a toilet.

The Sidewalling game: Capturing a sidewalling with a picture and sending to all your mates. (more points awarded for the tail being close to the top rim. Points deducted for trails leading into the water)
Mike captured a fantastic bit of sidewalling art, After sending a pic to all his mate he received a respectable 9 out of 10.
Sidewalling by DogKRO March 13, 2010

sidebaring 

When watching YouTube videos, "Sidebarring" is the process of becoming distracted from your original goal by watching all the unrelated videos you see in the sidebar.
While sidebaring cat videos yesterday, I found a video of a man riding a whale.

sidewalking

Walk on a sidewalk, especially after a nice date. Helps if it's a starlit night, and you can point out constellations in the sky.
After coffee they wanted to go sidewalking, alas there were no sidewalks to be found.
sidewalking by keysersoze99 September 23, 2021
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
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