adv. By the way; in passing.
That such a Doctrine..should be left thus faintly, thus obscurely, and, if I may so say, obitaneously, declared.
Confessions of an Inquiring Spirit, Samuel T. Coleridge (1834)
Last time I obitaneously suggested that infidelity can be humorous. I apologize, it should have been less obitaneous.
Here’s another one of those words that you can season your conversation with quite easily to sounder more smarter. Instead of saying “by the way,” or “B. T. Dubs,” you can say “Obitaneously, you still suck.”
Even if you don’t want to sound smarterer, it’s still a fun word to use. I recommend using it thrice a day after meals for 30 days or until you have received several obitaneous looks of disgust from your friends and family.