<p><strong>Interjection</strong></p><ul><li>(used as a mild expression of annoyance, rejection, disgust, etc.): What the heck do you care?</li></ul><p><strong>Noun</strong></p><ul><li>something remarkable of its kind (usually used in the phrase heck of a): That was a heck of an impressive speech.</li><li>Have one heck of a good time.</li></ul>