The term 'dark genre' can be defined by the four-letter word 'NOIR'. NOIR is a genre of film and literature that typically features stories of crime, mystery, and suspense. It often has a dark and cynical tone, with characters who are morally ambiguous or corrupt. NOIR films often feature a femme fatale, a mysterious woman who leads the protagonist into danger. NOIR literature often has a similar theme, with protagonists who are struggling to make sense of a chaotic world.