David X. Cohen

David Samuel Cohen, better known as David X. Cohen, is an American television writer. He wrote for The Simpsons, penning such notable episodes as "Lisa the Vegetarian" and "The Itchy & Scratchy & Poochie Show". He is credited with coining the word cromulent for the episode "Lisa the Iconoclast". He is best known for co-developing the animated television series Futurama with Simpsons creator Matt Groening.