Used to describe someone who is just a savage, vicious animal bastard.
(Sometimes pronounced with random excentuated consanants and vowels. Fore example. "You Annn-i-mal!!"
Guy 1: Glen is eating that steak out of a cup with a butterknife only..
Guy 2: He just jammed the who thing in his mouth so he could keep playing Dark Souls..
Both: What an animal..