# upsetter

> English word · Noun

## Definitions
1. One who upsets (something); a disrupter.
2. A person or device that turns something upside down.
3. A kind of forging machine that moves horizontally.

## Etymology
From upset + -er.

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