nulltimatum 

When an ultimatum cancels itself out as it destroys what it intended to conserve.

The paranoid sentiment that Obama was going to take people's guns was a nulltimatum on gun control for people who rushed to purchase firearms they thought they would lose, or had already effectively lost.

nulltimatum by Fiftystatebanana March 31, 2017

bulltimatum

An ultimatum that is disregarded because everyone knows that it will never be enforced.

Husband: That's it, I've had it! If that kitchen is not clean within the next half hour I'll never have sex with you again!

Wife: Uh-huh, right.... You can't make it a week. Sounds like you just issued a 'bulltimatum'.

bulltimatum by Bryan Gilbreath May 9, 2011