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.

Shelly Big Balls 

A woman who holds the power in a relationship and who acts like a man.
Make sure Shelly Big Balls doesn't find out
Shelly Big Balls by Timi79 November 11, 2022

Smelly Balls

When your balls stink becuase of the reasons below.
I just took a jog and my balls are sweaty! Poor smelly balls are trapped in my pants next to my leftover shit I forgot to whipe getting more smelly! Shit+Sweat=smelly balls!
Smelly Balls by Joeeeeee May 26, 2014

Peruvian Smelly Balls Trick 

An act of deception and great tactical nous. The victim, after having been stripped naked and rolled in butter, is stood infront of a very low beam, he then has a pair of very smelly, 3 week unwashed human testicles waved in his face. As said buttered naked victim reverses and bends to navigate under said low beam he unwittingly slots himself onto a ludicrously large freshly lubed dildo that has been stuck to the wall using a medievel glue like concotion of pigs semen and the matted hair from the crotch of a dead rabbit. As the victims buttocks hit the wall either side of the dildo and his eyes bulge wide in fear the perpetrator of this amusing parlour game waves his balls at the victim and shouts "Peruvian Smelly Balls Trick".

Please note due to recent legislation the use of rabbits hair is seen as being rather unsporting and frankly in bad taste.
With fear in his eyes the freshly buttered Steve recoiled away from the stench perpetrating forth from the rancid balls of Ali. As the dildo slipped betwixt his cavernous sphincter his eyes bulged, the corners of his mouth showed a glimpse of a smile and he sighed a deep groan of pleasure before the neanderthal Ali waved his balls dramatically and shreiked "Peruvian Smelly Balls Trick"!!!!!!!!!

Smelly Balls

A term used by the person who does the laundry when they can't remember what the fabric softener Downy Unstoppables is called.
Honey, can you buy some smelly balls? We are out and I have to do the laundry this weekend.
Smelly Balls by cornmesser June 10, 2021

Smelly Balls

when that one femboys balls are just always sweaty
"that guys got some pretty smelly balls, hes probably a femboy"
Smelly Balls by Allastorm November 7, 2025
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
Load more