Quick answer
Balderdash is a colorful old-fashioned word for nonsense. It is often used to reject a claim that sounds foolish, exaggerated, or absurd.
Word page
Balderdash is a colorful old-fashioned word for nonsense, foolish talk, or absurd claims. It is useful when a claim sounds too ridiculous for a plain, polite “that seems wrong.”
Balderdash is a colorful old-fashioned word for nonsense. It is often used to reject a claim that sounds foolish, exaggerated, or absurd.
In plain English, balderdash means nonsense. It usually describes talk, writing, theories, or excuses that sound foolish or ridiculous.
Balderdash is informal and old-fashioned. It sounds less clinical than false claim and more playful than misinformation, so it works well in commentary, fiction, quizzes, and comic dialogue.
The origin of balderdash is uncertain. Older uses may have referred to a jumbled mixture before the word settled into its modern sense of nonsense.
sense, truth, logic, evidence, sound argument
Balderdash is mostly used as a mass noun: “pure balderdash,” “complete balderdash,” or “a lot of balderdash.”
Use balderdash for lively dismissal. In formal writing, explain exactly what is false, unsupported, or illogical.
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Edited by Absurd Words. Last updated: May 14, 2026. See the editorial policy for how definitions, examples, labels, and update checks are handled on the site.