# muck up

> English word · Verb

## Definitions
1. To ruin unintentionally.
2. To clown around; to have fun, often at the expense of others.

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