Excluding specialized chemical names, I nominate
meaning "stance or policy against the wishes of fringe parts of the old Eastern Roman empire to form a new empire", or the opposition of the eastern Romans to any wishes of that kind in the countries they'd have taken from another nation, such as the Eastern Goths who had taken over Italy in the 490s and were subdued again by the emperor Justinian in the 6th century.
Another Roman one: lupercaliaficionados, meaning people who are/were major fans of the Lupercalia feast in ancient Rome when men would run around naked through the streets whipping whom they could reach, both men and women. According to Plutarch:
"Lupercalia, of which many write that it was anciently celebrated by shepherds, and has also some connection with the Arcadian Lycaea. At this time many of the noble youths and of the magistrates run up and down through the city naked, for sport and laughter striking those they meet with shaggy thongs. And many women of rank also purposely get in their way, and like children at school present their hands to be struck, believing that the pregnant will thus be helped in delivery, and the barren to pregnancy"
The festival took place in mid February, and one of the days would be the same as the modern St.Valentine's Day. In the years after the death of Julius Caesar, Mark Antony is known to have been one of the priests required to be naked (or, half nude and dressed in goat skins) while runing around the city and whipping the ladies. I bet Nero took the opportunity to hold that rank too.