<p><strong>Adjective</strong></p><ul><li>crum·mi·er, crum·mi·est.</li><li>Also Slang. dirty and run-down; shabby; seedy: a crummy fleabag of a hotel.</li><li>of little or no value; cheap; worthless: crummy furniture that falls apart after a month of use.</li><li>wretchedly inadequate; miserable; lousy: They pay crummy salaries.</li></ul><p><strong>Noun</strong></p><ul><li>plural crum·mies.</li><li>Railroads Slang. a caboose.</li></ul>