Of course. It's just an expression, Mr. Stooge.

[In any case- oh, Ripper. His name is famous enough for Saionji to know who he's talking about, and she laughs for a moment.] Good luck with that, because he'll never be caught. At least he only murders prostitutes, though, so unless you happen to be one, there's probably not much to worry about concerning him.

You never really know what's on a killer's mind, though. Some could say they're not even human.