- This article is about Lisa Simpson. For other uses, see Lisa (disambiguation).
Lisa Marie Simpson is a fictional main character in the animated television series The Simpsons. She is Green Bob's ex-girlfriend and a strict vegetarian. She is noted for her extreme liberal and environmentalist political actions such as freeing 50,000 live crickets in the school to spare them from dissection. (for which Geo Guy and Green Bob got detentions of which Liz was not informed.) Lisa has called Geo Guy "flesh eater", "vampire", "murderer" and "cannibal" for eating meat. She first appears in Meat is Murder.