<p><strong>Verb</strong></p><ul><li>(used without object) to bungle or blunder awkwardly; muddle: He somehow bumbled through two years of college.</li><li>to stumble or stagger.</li><li>to speak in a low, stuttering, halting manner; mumble.</li></ul><p><strong>Noun</strong></p><ul><li>an awkward blunder.</li></ul>