 What is the group name for hippopotamus? Bloat? And I would say the group name for monkeys is band. So who's telling a lie? Somebody's telling a lie with that fact. It's either Kayla. Marcus. Marcus. Marcus. It could be Marcus. Or it could be John. Kayla, what's yours again? The group name for weasels is called a gang. Marcus? The group name for hippopotamus is called bloat.