Some people do eat hippos.
Hippo meat is most often eaten in Africa and it's considered to be a delicacy in Africa.
The meat of the hippo can be cooked many different ways: grilled; roasted over an open fire or spit-roasted on top coals from wood fires (a traditional method.
You won't find hippo meat for sale at least legally in the USA or most of places outside of Africa because the sale of Hippo Meat is illegal in the USA and most other places as well.
Hippos are still eaten in their native West Africa, even though poaching and war have decimated the population.
Hunter-gatherers in Africa have been eating hippo meat for centuries.
The taste of the flesh is often described as being similar to beef, with a slightly sweet flavor and tough texture that can be improved by marinating it before cooking or smoking over an open fire.
The hippopotamus, also called the hippo, common hippopotamus, or river hippopotamus, is a large semiaquatic mammal and ungulate which is mostly herbivorous and native to sub-Saharan Africa.
It is one of only two extant species in the family Hippopotamidae, the other being the pygmy hippopotamus.
While the common hippo (Hippopotamus amphibious) is categorized as vulnerable, its smaller relative, the pygmy hippo (Choeropsis liberiensis or Hexaprotodon liberiensis), does have a place on the endangered species list.
Both species continue to be threatened by illegal hunting and shrinking habitats.