What is "ultimatum"?

when people are demanding, they want instant obedience. I prefer to a person asking for help with a caring voice.

I don't demand things I ask for things😈😥❤🤗

I had a guy give me an ultimatum once . We were supposed to marry in two days . He was being a mama’s boy . He said “ …or else …” I shook his hand and said , ..it’s been nice knowing you “ and I walked out . Needless to say , I don’t care for ultimatums

lots of ultimatums in gangster movies

should be " an ultimatum"