A biblical hunter, or in modern slang, a foolish or incompetent person.
From the Bible's Book of Genesis, Nimrod was described as 'a mighty hunter.' The insulting meaning emerged in 20th-century American slang, possibly influenced by Bugs Bunny cartoons mocking hunter Elmer Fudd.
Nimrod flipped from meaning a super-skilled hunter to meaning an idiot—Bugs Bunny calling Elmer Fudd 'nimrod' sarcastically in cartoons actually influenced how Americans used the word!
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