# smooth as butter

> English word · Adjective

## Definitions
1. Extremely smooth.

## Etymology
Possibly from Psalm 55:21 in the Bible: "His talk is smooth as butter …"

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