# shit in someone's Cheerios

> English word · Verb

## Definitions
1. Synonym of piss in someone's cornflakes.

## Etymology
From the breakfast food Cheerios. The term comes from the notion that defecating in someone's Cheerios would ruin their day.

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