no duff English

Meaning no duff meaning

What does no duff mean?

no duff interjection

— (UK, Ireland, Canada, AU, NZ, military slang, radio voice procedure) Indicating that this is not a drill or training exercise.

no duff noun

— (UK, Ireland, Canada, AU, NZ, military slang, radio voice procedure) An incident that is not a drill or training exercise; an emergency. Also end of exercise. Stop drill immediately. As a ‘tap out’ called by during physical training. Sim munitions training in Australian Swat ‘end ex’.