Pseudo-Philo, who was probably writing before the destruction of the Jewish Temple in 70 AD, describes Nimrod as an antagonist to Abraham. These stories are also found in the Talmud and in medieval Jewish and Islamic writings.
This kind of elaboration on a character in the Torah is not uncommon in Jewish legends. If you read about Esau in the Torah, he doesn’t come off too badly. His name really gets blackened in later Jewish legend, probably to justify making Jacob the good guy even though he got the blessing by deceiving his father.
Nimrod being not entirely a positive figure goes back a lot further than Bugs Bunny.
Named analogously with another aircraft with a hunter mission: The USN Lockheed P-3 Orion. Also named for a legendary hunter, and contemporaneous with the Nimrod.
I don’t think Duns Scotus’ own work fell into disrepute, although at various times it did become more or less fashionable. But it was regarded as very subtle and sophisticated, and “Duns” was applied to anyone whose reasoning was subtle and sophisticated. In time it came to be applied to one whose argument was considered too subtle and sophisticated - a hair-splitter, a sophist, a pedant. And then by about the sixteenth century it came to be applied ironically to one who was not subtle or sophisticated at all.
For those not in the know, here’s the “Nimrod” variation from Sir Edward Elgar’s Enigma Variations, Op. 36 (starting at 12:58.) It’s gorgeous and haunting, the emotional peak of the whole set of variations.
I’m American and yes “nimrod” is an insult in the U.S., but for me “Nimrod” is Elgar’s music.
I really think, without a doubt, it’s the Bugs Bunny thing.
And the Elgar “Nimrod” variation for his friend Jaeger is weird because of it’s beautiful intense passion. The variation he wrote for his wife is trite in comparison.