A very popular sport invented in Cambodia in 1924 to solve their overpopulation problem. The European occupation helped it spread to Britain, but was soon banned in both lands due to Cambodian dictatorship and British protest (King George III was nearly eaten by the Duke of York).
It is still practiced by Cambodian tribes, and is pressured to become an Olympic sport.
My Cambodian friend, Xiao Dong, likes to play cannibalism with my family, but every time we play one of my relatives goes missing....
The most common result of the gravitational merger of two or more galaxies is an irregular galaxy of one form or another, although elliptical galaxies may also result. It has been suggested that galactic cannibalism is currently occurring between the Milky Way and the Large and Small Magellanic Clouds.