# Reg Grundys

> English word · Noun

## Definitions
1. Undies.

## Etymology
Rhyming slang from the name of Australian businessman and media mogul Reg Grundy.

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