Cap that 

When someone says some dumb shit and you ain't fucking with it, like you don't think its a good idea

John: aye we should go in the woods
Chris: nah , cap that

Cap that by Prettymuchahoe...woohoo August 20, 2018

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