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I'd Cap that 

Displaying a particular interest in captioning a photo or situation. First made popular by the "I'd Cap That" app for iPhone.
Bryce: "Bro Veronica is looking hot tonight"
Mike: "I'd cap that"

Gary: "Dude labrendall is passed out"
Dane: "Let's cap that shit!"
I'd Cap that by idcapthat July 5, 2012

That's cap 

When someone is lying/talking bs.
Blue: I couldn't have killed him i was in electrical doing tasks.
Red: Ay "that's cap" i was in electrical with white.
That's cap by Scooberoo October 4, 2020

that’s cap 

a lie or a way to say “no way” when you don’t believe something
person 1: the other day I was driving down the street and I saw your ex on the street asking for money like a bum
person: that’s caaaap

or

person 1: dude my song dropped yesterday and it’s number 1 on billboard
person 2: that’s cap I just checked and it that drake song
that’s cap by hahayouthotnigga November 10, 2019

BOY THAT'S CAP! 

Is something you say when you don't want to get caught in a lie, but instead of coming up with a reason to support your lie, you just keep saying "BOY THAT'S CAP!" and get louder with each one, until eventually they just find out that you're full of shit.
Bruce: "DeAndre literally copied my Essay word for word, he even used the same font."

DeAndre: "BOY THAT'S CAP BOY THAT'S CAP THAT'S CAP BOY THAT'S CAP BOY THAT'S CAP BOY THAT'S CAP!"

Bruce: "........."
BOY THAT'S CAP! by BOI64 September 28, 2020

ayo that's cap 

"Hey you, that's not true" in a coolio way
Some dude: I'm a virgin
Some dude again: ayo that's cap
ayo that's cap by reswip March 8, 2021

nah g that's cap

A phrase often used in Among Us Gameplay and is a phrase to describe someone's lying about there positioning or if they are an imposter.
Alicia: I was in MedBay
Reily: Nah g that's cap
nah g that's cap by Frobo V2 September 23, 2020
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
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