Created by: CharlieB
Definition: interj. A word, or sound, used to express disappointment when you realize you've made a really stupid mistake. v. To moan and groan about how stupid you are.
Sentence: Frank sighed as Jane missed the exit on the roundabout for the third time. "DundDERhead," he muttered under his breath.
Etymology: dunderhead (stupid person) + der (derogatory exclamation in reponse to acts of stupidity)