I was under the impression that using "nimrod" as an insult was an American thing (reference https://en.wikipedia.org/wiki/Nimrod#Idiom https://en.wikipedia.org

I was under the impression that using "nimrod" as an insult was an American thing (reference https://en.wikipedia.org/wiki/Nimrod#Idiom https://en.wikipedia.org/wiki/Nimrod#Idiom ). The creator of Nim is European.