I love jejune! That's a fun word to say. And the first thing that came to my mind is the June bugs we get every spring. Jejune bugs hang around our porch lights and sometime smack me in the head. (Yes, I know that's the wrong definition, but it was fun to say out loud.) jejune jejune jejune!
Mona, I found this after a Google Search - It said it was mid 18th century English and that it was a term from the two words ragman roll which meant that it was paper or a document that had a list of offenses. I will tell you the truth, I have said this word, but had no idea how to spell it. And, I believe I have used it wrong. I think I have used it when I was trying to explain or say there was a crazy situation. I will stop rambling now.