Penguin slavery is a time where penguins suffer from slavery and until the Prehisteria Party. Penguins are forced to eat an ugly bearnguin who listens to gangnam style in a bikini's poop.
Penguins became Herbert's slaves so he can dominate the Elite Poop Farts.
Other tan being slaved by Herbert,they were also slaved by Poop puffballs. The puffles spanked them and hit them with a sharp,frozen fly swatter on fire.