cannibalistic

Examples from literature

Skoocooms were cannibals – they ate other people! 
For fear he should turn cannibal and eat you? 
I thought cannibals were people that ate each other. 

cannibal | American Dictionary

cannibal
noun[ C ]
us/ˈkæn·ə·bəl/
a person who eats human flesh, or an animal that eats the flesh of its own type of animal