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.

ball brain 

When you squeeze your nut sack and your testicles come up together and they look like a brain
Dude, check out my ball brain!

Brain Balls

When your scrotum is tight and together, forming a "brain"- like figure.
Its cold out here", "Tell me about it, I have had brain balls since i walked out here
Brain Balls by TehBud May 7, 2011

brain balling 

I'm just brain balling here but I think it's a good idea.
brain balling by unizebra September 10, 2020

juggle the brain balls 

Can mean to be concentrating or thinking, and in some cases rubbing your testicles to be able to relax and to think.
Dude, that quiz is gonna be rough... I'm gonna juggle the brain balls to get ready.
juggle the brain balls by mrsman January 16, 2007

his balls were bigger than his brain 

This can be used to define times when a guy does something that requires a great deal of nerve and skill, but he is truly lacking in skill and ends up hurt, humiliated, and/or dead. Alcohol is considered the main accelerant to this condition.
Roz looked down from the 58 foot cliff that overlooked the shallow, rock-filled lagoon. While diving to his imminent death, he knew that his balls were bigger than his brain.

Ballsack Brain 

A scientific way of saying you have a brain tumor or you have no idea what you’re doing
Jerry was looking around with no clue on what he was doing. “I think I have ballsack brain!”
Ballsack Brain by DoctorNeo July 13, 2022
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