You're capping

[Tait-ka]

Once one of my friends told me that "You're capping." means lying or saying things that aren't true.

Is this common among you native English speakers?
Why can't I find its definition as "to lie" in dictionaries?

Thank you.

 

[5jj]

This speaker of BrE has never heard this expression.

 

[Tait-ka]

I just found it in thefreedictionary.com

https://idioms.thefreedictionary.com/capping

4. verb, slang To lie.
- Quit capping and just tell us the truth!
- I hope you realize that Frank's always capping, and that none of his wild stories are true.
- Would you quit capping? I know you don't make that much money.

I wonder why you haven't heard it.

 

[5jj]

I wonder why you haven't heard it.

There are thousands of informal expressions I haven't heard of.

 

[Skrej]

I wonder why you haven't heard it.

It's relatively new slang, circa 2018 or so according to Google. It was probably a few years after that I first heard it.

It's also possible it's not used (or widely used) in BrE. Slang has to hang around a really long time to become part of the common vernacular. Not all slang survives long enough to become commonly used.

It's also possible it hasn't made the jump from AmE to BrE.

 

[emsr2d2]

I haven't heard anyone use "capping" or "cap" as a verb but I have certainly heard UK teens say "No cap!" after making a statement. It means "truthfully", "genuinely" or, more closely connected to that slang definition, "No lie!"

 

[5jj]

It's clear that @Skrej and @emsr2d2 are younger that I.

But then everybody is (sigh).

 

[Skrej]

I'm old school - to 'cap' someone is to shoot them, not lie to them.

It's clear that @Skrej and @emsr2d2 are younger that I.

But then everybody is (sigh).

Maybe we're just hipper, five-dawg. Age ain't nuttin' but a numbah.

I haven't heard anyone use "capping" or "cap" as a verb but I have certainly heard UK teens say "No cap!" after making a statement. It means "truthfully", "genuinely" or, more closely connected to that slang definition, "No lie!"

That the context I've heard as well. I haven't heard it used as a verb, either.

The only verb form I'm familiar with is the one about shooting, as per above. However, in that context it can also be a noun meaning something like 'shot' or 'bullet' - i.e. 'bust a cap in your a**"