The Stuff Song is a duet song performed by Finn and Jake in the episode "Belly of the Beast." Finn and Jake chose to sing this song to get the attentions of the partying bears. It is a sad, downbeat song about the ultimate fate of everything that we eat, and possibly metaphor for the bears' situation inside the Giant.
Finn: My hotdog's dead..
My pizza's dead.
My cupcake is dead.
Jake: Oh, uh... My doughnut's dead.
My burger's dead.
My milkshake is dead.
Finn: All of our favorite foods are totally dead.
They can not procreate in little food beds.
We'll eat them up and turn them into stuff.
Jake: And we'll cry over their graves, but you can't cry enough...
Finn & Jake: When you miss someone you love, you can't cry enough...