# if it fits, I sits

> English word · Phrase

## Definitions
1. A domestic cat, out of instinctual habit, will sit in any empty box or other container of any size that is left unattended.

## Etymology
Chosen for the rhyme. The expression stems from a jocular wordplay on the slogan "If It Fits, It Ships" adopted by the USPS for its holiday advertising campaign in 2009. Its earliest known appearance is from an image macro series posted on the ICanHasCheezburger blog on October 10th, 2011.

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