<p><strong>Adjective</strong></p><ul><li>Untidier, untidiest.</li><li>Not tidy or neat; slovenly; disordered: an untidy room; an untidy person.</li><li>Not well-organized or carried out: an untidy plan.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) untidied, untidying.</li><li>To mess up; disorder; disarrange: The guests untidied the room.</li></ul>