<p><strong>Verb</strong></p><ul><li>(used without object)<ul><li>fiz·zled, fiz·zling.</li><li>to make a hissing or sputtering sound, especially one that dies out weakly.</li><li>Informal: to fail ignominiously after a good start (often followed by out): The reform movement fizzled out because of poor leadership.</li><li>Synonyms: founder, collapse, miscarry.</li></ul></li></ul><p><strong>Noun</strong></p><ul><li>a fizzling, hissing, or sputtering.</li><li>Informal: a failure; fiasco.</li></ul>