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When at a basketball game and people yell "ball'in" they mean that the ball has gone into the hoop and the team has scored 2 or 3 points.
you that's ball'in
Ball'in by Claudia203 January 7, 2016

Ball in Dirt 

When the Vagina is completely closed with both cheeks tightly pressed together due to lack of penetration.
Hey, I bet post-breakdown Miley Cyrus is a ball in dirt
Ball in Dirt by Jilly Juices January 5, 2014

Ball In A Cup 

Mexico's Favorite Toy For over 1000 years!
The objective is to catch the ball in the cup.
No need to worry if you miss, as the ball is attached to a string that is attached to the cup!
Storage is as easy as catching a ball in a cup!
Ball in a cup, ball in a cup, it's a ball in a cup!

ball in road 

A game where a circle of people sit in the middle of a road and pass a ball back and forth between eachother. The group is not allowd to get up until a car stops and beeps three times.
Girl #1: Dude, did you hear about the group of kids who got run over?
Boy #1: No. What happened?
Girl #1: They were playing ball in road.
ball in road by phil knight August 24, 2006

Ball in Hand 

In various types of pocket billiards (pool), "ball in hand" refers to a player's right to place the cue ball anywhere on the table. Getting "ball in hand" means that the opposing player (the offending player) committed a foul, an example being a table scratch.
"Ball in hand," he yelled, throwing the cue ball sheepishly on the table after fouling.
Ball in Hand by Giskard July 2, 2004

Ball-in-socket

During sexual intercourse, the male precedes to drop one or both testicles into either the vagina and anus. Suggested sexual positions for maximum effort:
Sexual see-saw, ripe plum, overpass, drill, deck chair, and the butter churner.
Adam: "Dude, why are you walking so funny?"
Chad: "my balls hurt so bad man. I tried to ball-in-socket my girl last night..in the anus."
Ball-in-socket by Slimjym November 14, 2016
More from Urban Dictionary

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
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
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