It's a one-celled critter with no brain, that can't fly!
Peter Banning: Rufio, if I'm a maggot burger why don't you eat me! You two-toned zebra-headed, slime-coated, pimple-farmin' paramecium brain, munchin' on your own mucus, suffering from Peter Pan envy!
Don't Ask: What's a paramecium brain?
Peter Banning: I'll tell you what a paramecium is! That's the paramecium! It's a one-celled critter with no brain, that can't fly! Don't mess with me man, I'm a lawyer!