The only character in "The Simpsons" that takes the fun out of everything that Homer and Bart do. Teamed with Marge, any episode revolving around these two can be dismissed as a waste of time and thus, Matt Groening should be kicked in the face for creating these characters' horrible personalities.
Fan1: Dude! Did you see that episode when Homer had the huge BBQ in his back yard?
Fan2: Isn't that when Lisa became a vegitarian and runied the whole outing?
Fan1: Yeah... Stupid Lisa...