From Longman Dictionary of Contemporary Englishend of (story)end of (story)spoken informal used to mean that you will not say any more about something, or that the situation cannot be changed I’m not going – end of story. → end
Examples from the Corpus
end of (story)• The fish will get their wheatgerm this autumn, end of story.• Another good restaurant bites the dust -- end of story, right?• I'm not going to lend you any more money, end of story.• Mark a ballot, lick a stamp: end of story.end of storyend of storyEMPHASIZEused to say that there is nothing more to say about a particular subject As far as I’m concerned, Terry is still a friend – end of story. → storyExamples from the Corpus
end of story• The fish will get their wheatgerm this autumn, end of story.• Another good restaurant bites the dust -- end of story, right?• Mark a ballot, lick a stamp: end of story. 