<p><strong>Verb (used without object):</strong></p><ul><li>to be sulky or morose; show discontent; complain, especially in an irritable way.</li></ul><p><strong>Noun:</strong></p><ul><li>a sulky, complaining, or morose person.</li><li>a sulky, irritable, or morose mood.</li></ul><p><strong>Synonyms:</strong></p><ul><li>grumbler</li><li>killjoy</li><li>crab</li><li>spoilsport</li></ul>