no duff
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
Indicating that this is not a drill or training exercise.
Register: slang
Examples
“Sunray, No Duff, No Duff, No Duff. We need a medic, we’ve got a man down. Wound to the upper arm, and major blood loss. Over.”
All the other chatter on all the radios went dead with the ‘No Duff.’ It was the signal for a medical emergency.
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 “no duff” mean?
Indicating that this is not a drill or training exercise.
Is “no duff” formal or informal?
no duff is generally slang.