(UK, Ireland, Canada, Australia, New Zealand, Singapore, military slang, radio voice procedure) Indicating that this is not a drill or training exercise.

(UK, Ireland, Canada, Australia, New Zealand, Singapore, 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’.

(law) An agreement in which a creditor promises not to enforce a debt.

(Ulster) insane

(Ulster) never

(law) A day on which courts are not held.

(Ulster) sleep

(idiomatic) To break new ground.

plural of non-op

Nonoperational; not functioning. / (medicine) Nonoperative; not using or requiring surgical treatment.