Dog Eat Dog Job City Loop Ruthless Competitive Fast Paced Ed

1. Ed decided to quit his job in business because everyone seemed so dishonest, trying to get his job and steal his clients. It was a dog-eat-dog world.
2. John moved away from New York City to a small town in the Midwest because life in the big city was dog- eat-dog.

The expression suggests the idea of animals that are so desperate that they eat their own kind.