Zombus are a kind of zombies which seek out prunes, but their speech impediment makes them gravely understood as if they are hungry for brains.
Pronounced with a U like in BULL, rather than like in GUM.
Singular is Zombu
A zombie and a zombu slouch down the marketplace
People run away
People: Ahhhhhhhhh! Zombies!
Zombu and his zombus friends catch a prune stall and eat prunes.
People: Cool, these are only zombus!
Zombie catches a person, cracks open their head, and slurps the brain.