grundies
Proposed by a contributor, not yet supported by evidence.
Meaning · English
Underpants.
Register: slang
Examples
So I shrugged and shifted like my grundies were too tight.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “grundies” mean?
Underpants.
Is “grundies” formal or informal?
grundies is generally slang.