# cap on

> English word · Verb

## Definitions
1. To spread caps (lies) or false rumors (about someone); to slander (someone); to insult (someone's) family.

## Etymology
From cap (“a lie or exaggeration”) + on.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/cap-on