Grade F Meat was the only meal that Lunch Lady Doris could serve the students and faculty of Springfield Elementary due budget cutbacks, until Principal Skinner (and Lunch Lady Doris in a deleted scene) tasted the liquid that spilled on Jimbo that they discovered he was tasty and became a charade to eat any students who were sent to detention which eventually ended up being all of them (starting with Jimbo Jones then ended with Bart, Lisa, and Milhouse). Grade F Meat's ingredients comprised of "mostly circus animals and some filler".