An example of an omnivore is a human.
Bears are omnivores, they can eat plants but they enjoy eating fish.
Since meat is a primary source of protein in an omnivore's diet, it's important for people who do not eat meat to find worthwhile vegetarian protein sources.
Devouring like a cultural omnivore, eating with the mouth open, very wide, so as people might see inside.
In The Omnivore's Dilemma (2007), author Michael Pollan explains that raising one cow in a standard factory farm uses roughly 35 gallons of oil.