# ninnyhammer

> English word · Noun

## Definitions
1. A foolish person; a simpleton.

## Etymology
Apparently from ninny (although attested slightly later) + -hammer, of unknown origin; perhaps compare earlier hammer-headed.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/ninnyhammer