Video games will tell you that a "holy water sprinker" is some kind of chained weapon, like a flail. That's probably because they confuse it with the Aspergillum which is a religious tool that literally dispenses holy water.

"Holy water sprinkers" were a real thing, but they are not chained weapons. They are combination gun-maces, like this example from the Tower of London. "Spilling holy water" was a period euphemism for "bloodshed".