<p><strong>Verb</strong></p><ul><li>(used without object) To blunder; make an error, misjudgment, etc.</li><li>To waste or kill time; evade work or responsibility (often followed by off or around): Exam week is not a time to goof off.</li><li>We goofed around till train time.</li></ul><p><strong>Noun</strong></p><ul><li>A foolish or stupid person.</li><li>A mistake or blunder, especially one due to carelessness.</li><li>A source of fun or cause for amusement: We short-sheeted his bunk just for a goof.</li></ul><p><strong>Verb Phrase</strong></p><ul><li>Slang. To tease, ridicule, or mock; make fun of.</li></ul>