1. Chinese crimelord created by Sax Rohmer. Once as popular and widely-used as Dracula, and the template for Ming the Merciless, comics villain the Mandarin and countless others. Now considered highly politically incorrect.
2. Style of facial hair. Long, thin, drooping moustache sometimes accompanied by a wanky little goatee. Looks distinguished on older Oriental gentlemen, elsewhere is a crime against decency.
"That's the thing about the fu manchu. On Fu Manchu is looks cool. On you... less so."