Chopped liver is a sentient jar of chopped liver that appears in the episode "Growth Spout."
It comes in a jar with a light blue lid and the actual contents in it are purple. It has a yellow label on the front that reads the product's name in red text with some fancy squiggles also in red.
Role in episode
Both have apparently gone unnoticed by Mr. Krabs for some time. The chopped liver is mostly used as a gag only, for when the biscuit asks, "What am I, chopped liver?," the chopped liver replies, "No, that's what I am."