When it was used to describe a new vampire movie ...
Lookups spiked on June 21, 2012.
Many reviews used the word to describe the new movie Abraham Lincoln: Vampire Slayer.
For example, according to The Hollywood Reporter, "Genre enthusiasts will lap up the mixture of action and fantasy, while history buffs who don't mind a bit of rewriting will dig into an alternative spin on the Civil War period."
Genre means "a particular type or category of literature or art."
It comes from the French word that means "kind" or "sort," and is also the root of gender.