In slang, cap means a lie, and as a verb it means to lie or exaggerate: That's cap means “I don't believe it”, stop capping means “stop lying”. It's usually part of a jokey argument between friends. It's slang for chats and talking with friends; in an essay or work message, say that's not true or I don't think that's accurate.
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That's cap.; stop capping; I'm not capping; cap = a lie (slang)
- You finished that whole book in twenty minutes? That's cap.
- Stop capping; I saw you check the answer.
- I'm not capping — the queue really went around the building.
What changed
First versionStop cap; you didn't win every round.
RevisionStop capping; you didn't win every round.
After stop, an action takes the -ing form: stop capping, like stop talking. Stop cap mixes the noun “a lie” with the verb “to lie”. And the p doubles before -ing: capping.
No cap is the opposite: “no lie”, “for real”: the queue was two hours long, no cap. In everyday English, cap is a hat, a lid or a limit: a spending cap. The slang meaning shows in context, a reply under an unbelievable story.
Your turn
The speaker thinks the story is false: That's ___.
Show the answer
cap — The speaker thinks the story is false, so the reply is cap. No cap would confirm that it's all true.
Reply to a friend's clearly exaggerated story about winning a game. Use cap or capping and say why you don't believe it.
That's cap — you said you lost the first two rounds yesterday.
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