English Etymology From neck + biter, likely after the pattern of ankle-biter. Noun neckbiter (plural neckbiters) (informal) A vampire. 2009 April 4, Amy Longsdorf, “Kristen Stewart: Still indie at heart”, in Toronto Star:With Welcome to the Rileys in the can awaiting release, Stewart is already back into the world of neckbiters and werewolves. Wikiwand - on Seamless Wikipedia browsing. On steroids.