Answering the mod note here: It's a style of mustache named for the pulp villain.
Topic on Talk:Genghis Khan
So the trope entry should be changed, I gather. "Good Hair, Evil Hair", or is there a better trope?
Either/both could apply, really.
Let's go with the more specific trope, then. I like specificity. :)
Fu Manchu had no moustache in the original novels, ironically. Just saying. He was explicitly described as clean shaven.
Adaptational quirk worth noting in examples about him on those pages, then!