Pig

Pig is exactly what he sounds like: a pig, occasionally glimpsed wandering the margins of New New York in Futurama's sprawling background gags. He doesn't want anything in particular beyond whatever a pig wants, and he behaves like livestock that happens to live in a city of robots and mutants.

The joke is the flatness of the premise: a show obsessed with intergalactic bureaucracy and doomed romance still finds room for a pig doing pig things in frame six of a crowd shot. Maurice LaMarche's vocal talents are otherwise deployed on grander characters, which makes this tiny, wordless cameo funnier by contrast.