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.
1. Something that is rad to the core. A description of an action or thing which is especially impressive/fucking rules.
Did you see that guy snorting coke out of that strippers ass crack? That was radcore.
radcore by Chris Westwood April 12, 2005
A term used by those who struggle to define the genre of the American Rock Band Falling In Reverse. Due to their diverse sound that encompasses Post-Hardcore, Metalcore, Pop-Rock, Pop-Punk, Rap-Metal and Electronica. Often releasing songs that fuse multiple genres at once.
Youtube Comment: Ronnie is his own genre now. You can’t label him with just one.
Reply: Yes you can. Radcore.
Radcore by An Aussie Emo Boi April 8, 2022
A combination of radical & hardcore positively expressing something extreme and vulgar. Otherwise just a replacement for very cool & words to that effect.
Your jam was radcore!
radcore by erratika June 18, 2004
holy crap thats so radcore to the fully full on hardcore max extreme.
radcore by Ashley November 28, 2004
adj: anything that is hardcore, yet totally cool.
Michael Scofield's tattoos in Prison Break are radcore!
Radcore by Subba Slut November 18, 2007
RADCORE (pronounced 'rad'-'kOr)- noun. A style of rock and roll music rooted in PUNK ROCK but reflecting the lifestyle associated with totally rad beach bum party animals, and being predominantly demonstrated by the Florida band BOMBSHELL LUST. origin: 2009. synonyms: Beach Punk. antonyms: pop rock.
Bombshell Lust plays music that sounds like fast catchy punk rock, but because the subject matter of the songs involves surfing, babes, and partying on the beach- the band should actually be described as RADCORE!
radcore by Mikey Shmikey April 11, 2010
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

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
Load more