No cap

No lie, for real.

What it means

No cap means “no lie” or “for real.” People usually add it to show they are not exaggerating, especially about something hard to believe. Cambridge defines it as “used for emphasizing that what you are saying is true.” The opposite is cap, a lie or exaggeration, so “that’s cap” means “that’s not true.” Dictionary.com notes it is sometimes written in emoji, as 🚫🧢.

Where it comes from

Cap has meant to brag or exaggerate in Black slang for a long time; Dictionary.com traces that sense to the early 1900s. The full phrase is closely associated with Atlanta-area hip-hop. Dictionary.com finds it on Twitter “by at least 2012” and says it was popularized in 2017, when Young Thug and Future released a track called “No Cap.”

Who says it now

The translator lists no cap under Gen Alpha as one way of saying “unbelievable, but true.” That is the wheel’s convention; the phrase itself is older than Gen Alpha and was spreading through hip-hop and online in the 2010s.

Tone

Casual and emphatic, and not rude in most uses. It can be sincere (“no cap, that was scary”) or comic, stamped onto something trivial (“best sandwich of my life, no cap”).

What adults hear, what kids mean

A parent may picture a baseball cap, or take it as “no limit,” which is a real meaning of the ordinary phrase that Dictionary.com also mentions. A kid usually means “I am not lying.” The reverse matters too: “that’s cap” is calling something a lie.

How to use it

No cap can go at the start or the end of a sentence. It can also stand alone as a question, “No cap?”, meaning “Seriously?”

Two examples, written by us:

How to answer it

A kid who says “no cap” usually wants to be believed. “I believe you” or “Seriously?” both work. If you want to tease them, the comeback is “Cap,” but expect a reaction.

Same idea, other generations

The Slang-o-matic wheel files No cap under Gen Alpha for the idea of unbelievable. These are the words it files under the same idea, by generation. They are related, not always exact translations:

Related slang

Try the slang translatorAll slang by generation

Sources

Meanings and dates on this page come from these dictionaries. Each quote is copied word for word from the linked page.