Grundies

//ˈɡɹʌn.dis// noun, slang

noun, slang ·Uncommon ·College level

Definitions

Noun
  1. 1
    Underpants. Australia, New-Zealand, UK, plural, plural-only, slang

    "So I shrugged and shifted like my grundies were too tight."

Synonyms

All synonyms
conformistmrs. grundyprigpuritan

Example

More examples

"So I shrugged and shifted like my grundies were too tight."

Etymology

* As Grundies, an underwear brand name. * Possibly an abbreviated form of Reg Grundies, rhyming slang for undies, after media magnate Reg Grundy.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.