the.com/ultimatum
A choice dressed up to look like one — the final word with a deadline.
means A final demand backed by a serious threat if the other side refuses or stalls.
from From Latin ultimatus, the past participle of ultimare, to come to an end — diplomacy's polite word for the end of patience.
PluralUltimatums or, for purists, ultimata.
Diplomatic originLong a formal term for a nation's final terms.
Built-in clockNo deadline means it is just a complaint.