fizzle out

Verb

fizzle out (third-person singular simple present fizzles out, present participle fizzling out, simple past and past participle fizzled out)

1. (intransitive, slang) To lose excitement, to become less exciting; to end, fail or die out in a weak or disappointing way.
   • Tottenham had hoped to make a statement of real intent against the title pace-setters and while manager Harry Redknapp did not secure the victory he craved, he at least saw his side match United every stride of the way in a game that fizzled out after a bristling start.2011 January 15, Phil McNulty, “Tottenham 0 - 0 Man Utd”, in BBC
   • That would see the disputes fizzle out into an industrial relations zombie - neither living nor dead.2023 March 8, Philip Haigh, “Comment: Give rail staff a pay vote”, in RAIL, number 978, page 3
2. (slang, transitive) To kill or end (someone or something).