Cannibal Ferox, also known as Make Them Die Slowly in the US and as Woman from Deep River in Australia, is a 1981 Italian cannibal exploitation horror film written and directed by Umberto Lenzi. Upon its release, the film's US distributor claimed it was "the most violent film ever made". Cannibal Ferox was also claimed to be "banned in 31 countries", although this claim is dubious. The title derives from the Latin ferox, meaning cruel, wild or ferocious.