A person who eats meat virtually to the exclusion of vegetables. The meatatarian often claims to be conserving veggies for those who would actually eat them, and keeps the veggies out of the waste stream, helping the environment, or keeping produce costs down.
Waiter: "What can I get you?"
Mary: "A cheeseburger delux, hold the lettuce, tomato, coleslaw, and pickle."
Waiter: "So you just want the burger and fries."
Mary: "Yep, I'm a meatatarian."
Someone who eats meat specifically because an animal had to die in the process of making it. They are plant lovers and fight for the rights of plants. They are rivals with Vegetarians and look at each other as the scum of the earth.