# bold as brass

> English word · Adjective

## Definitions
1. Very bold; very forward or impudent.

## Etymology
Popularly supposed to have originated in reference to Brass Crosby, Lord Mayor of London in the 1770s, who was bold enough to defy the British parliament. However, this origin theory is dismissed by some as bogus.

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