<p><strong>Adjective</strong></p><ul><li>attractively stylish or smart: a nifty new dress for Easter.</li><li>very good; fine; excellent: a nifty idea.</li><li>substantial; sizable: We sold the car for a nifty profit.</li></ul><p><strong>Noun</strong></p><ul><li>something nifty, as a clever remark or joke.</li></ul>