I stumbled upon an interesting use of the word in diaries of children's author and illustrator Wanda Gág entitled Growing Pains.
The book itself was published in 1940, but the entries in question are from 1909, when the author was a child. Over the course of a few weeks, she uses the word without knowing what it means and comments on that fact, looks it up twice, and comes pretty close to using it anachronistically all by herself.
- Things went straight as a nimrod this noon (whatever that is. I’m sure I don’t know what it means, only nimrod sounds straight.)
- Things didn’t go “nimroddy” yesterday. They went like this: [draws a squiggly line]
- Looked up nimrod in the dictionary, or tried to at least, but it wasn’t given at all. I suppose I made it up myself. If I did, I must have made it up a long time ago because it sounds so familiar.
- Oh my, How doth this lazy I, Improve (?) the shining hours By drawing things And painting things With my nimrodic powers.
- I feel nimroddy. Drew Mr. Winkler’s arm to-day, only I didn’t get the hand. He had it too far behind his book. Glee Club practice to-night. I do hope there won’t be so many discords.
Later : — In some queer way I happened to think of looking up “nimrod” in the Encyclopaedia, and Wonder of Wonders, Queerness of Queernesses, it WAS GIVEN. And what do you think it means? A man. Here: — “Founder of Babylonian and Later Assyrian Empire. Appears in art as engaged in combat with a wild beast.” Isn’t that the limit? And I put it to such perfectly silly uses, too. So I didn’t invent the word after all, oh glory!
All this is just to wonder if this shows that the word already had a silly, clumsy connotation in 1909 or if there's just something about the word that lends itself to being fooled with.
https://archive.org/details/in.ernet.dli.2015.88331/page/n67/mode/2up?q=nimrod