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The act of a gay couple holding each other’s penises whilst covered in a sticky substance of their choosing.
Brad: Yo, you and John did a pierro?
Matt: Yea, we used marshmallow fluff though. Wasn’t as good as peanut butter.
pierro by jojoman235 November 18, 2017
Related Words
Pierro is a psychopath en the only thing

What is important voor him is loyalty

If you crossed him better watch out
Don’t snitch or i gonna pierro you
Pierro by Kananstark November 22, 2021

nick pierro 

This guy has a great dick get plenty of girls and has good friends that guy is fucking awesome
Girl 1: OMG i was with nick pierro yesterday and he gave me great dick then a russian flashbang
Girl 2: fuckin lucky bitchhh
nick pierro by Buzzlightquer July 13, 2017

del pierro 

A continuation on the 'DP' acronym for the smut movie regular act of double penetration.
Dave : 'You've seen Piledriving Miss Daisy, what's it like?'

Clive : 'Normal, gob, moota, Del Pierro, fairly standard'
del pierro by T Boor July 1, 2008

pierre gasly effect

getting people to wear a backwards cap
valterri bottas has a backwards cap on, wow he has succumbed to the pierre gasly effect
pierre gasly effect by isaaaaaaaaaa November 27, 2021

The Pierre effect 

The Pierre effect is named after f1 driver Pierre Gasly. He wears his hat backwards most if not all the time. It’s used when other drivers also wear their hats backwards and look mighty fine.
What does Charles with the Pierre effect mean.
It means he’s wearing his hat backwards
The Pierre effect by Kalinski November 29, 2021
More from Urban Dictionary

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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