The story
Blend of penultimate + ultimatum, equivalent to pene- + ultimatum.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A statement of terms or conditions made by one party to another, commonly expressed as an ultimatum in the hopes of compelling immediate compliance with demands, but that then is superseded by more negotiation instead of actual dire consequences. Full definition →
Blend of penultimate + ultimatum, equivalent to pene- + ultimatum.
Etymology from Wiktionary, CC BY-SA 4.0.