Wearenotamused I woke up this morning to find one of Carolyn's random text-message queries awaiting me: C: What is the plural of Hippopotamus? R: Hippopotwomuses. C: With a w? R: It was a joke… Plural: HippopoTWOmuses! C: That's a very early in the morning joke! By Richard Carter A fat, bearded chap with a Charles Darwin fixation. View all of Richard Carter's posts.